Easa Physics 1

Module 2 part 1 1. Matter.

Question Number. 1. An atom with 3 free electrons in its outer shell is said to be. Option A. pentavalent. Option B. covalent. Option C. trivalent. Correct Answer is. trivalent. Eplanation. Number of electrons in the outer shell is called the valenc! " 1 # monovalent$ % # divalent$ 3 # trivalent etc.

Question Number. %. %. &hat is the mass number of an element'. elem ent'. Option A. Number of electrons and protons. Option B. Number of neutrons and protons. Option C. Number of electrons and neutrons. Correct Answer is. Number of neutrons and protons. Eplanation. N().

Question Number. 3. 3. &hat do !ou *et when !ou add %+ % and O'. Option A. +% O. Option B. %+ % O. Option C. %+ % O% . Correct Answer is. %+ % O. Eplanation. &ater &ater is molecules each made up of % h!dro*en atoms and 1 o!*en atom. +ere ther is , h!dro*en atoms$ and % o!*en atoms$ so we can ma-e % water molecules.

Question Number. ,. ,. he splittin* of a chemical compound is called. Option A. bombardment. Option B. s!nthesis. Option C. anal!sis. Correct Answer is. anal!sis. Eplanation. N().

Question Number. /. /. &hat is the atomic number of an element'.

Question Number. 3. 3. &hat do !ou *et when !ou add %+ % and O'. Option A. +% O. Option B. %+ % O. Option C. %+ % O% . Correct Answer is. %+ % O. Eplanation. &ater &ater is molecules each made up of % h!dro*en atoms and 1 o!*en atom. +ere ther is , h!dro*en atoms$ and % o!*en atoms$ so we can ma-e % water molecules.

Question Number. ,. ,. he splittin* of a chemical compound is called. Option A. bombardment. Option B. s!nthesis. Option C. anal!sis. Correct Answer is. anal!sis. Eplanation. N().

Question Number. /. /. &hat is the atomic number of an element'.

Option A. he number of neutrons in the atom. Option B. he number of electrons in the atom. Option C. he number of protons in the atom. Correct Answer is. he number of protons in the atom. Eplanation. N(). http0en.wi-ipedia.or*wi-iAtomic2number

Question Number. . . An atom with / free electrons is said to be. Option A. pentavalet. Option B. covalent. Option C. trivalent. Correct Answer is. trivalent. Eplanation. he valenc! is the number of electrons in the outer shell if that number is , or less. (f there are more than , electrons$ el ectrons$ the valenc! is 4 minus the number of electrons. (n this case 4 "/ # 3 # trivalent.

Question Number. 5. An atom consists of. Option A. protons$ neutron and electrons. elect rons. Option B. protons and electrons.

Option C. protons and neutrons. Correct Answer is. protons$ neutron and electrons. Eplanation. N().

Question Number. 4. he maimum number of electrons in the inner shell of an atom is. Option A. 4. Option B. %. Option C. ,. Correct Answer is. %. Eplanation. N().

Question Number. 6. he mass of a proton e7uals the mass of a. Option A. neutron. Option B. beta particle. Option C. electron. Correct Answer is. neutron. Eplanation. Mass of a proton # mass of a neutron 8well$ ver! nearl!9.

Question Number. 1:. Catal!sts. Option A. speed up reactions. Option B. speed up and slow down reactions. Option C. slow down reactions. Correct Answer is. speed up reactions. Eplanation. A catal!st speeds up reactions$ an inhibitor slows down reaction. Question Number. 11 11.. (f the outer shell of an atom is full the the element is. Option A. unstable  reactive. Option B. a *ood conductor. Option C. practicall! inert. Correct Answer is. practicall! inert. Eplanation. N().

Question Number. 1%. 1%. Molecules of the same compound are held to*ether b!. Option A. cohesive forces. Option B. adhesive forces. Option C. *ravitational forces. Correct Answer is. cohesive forces. Eplanation. Cohesion is the propert! that causes li-e substances to clin* to*ether t o*ether 8e* water molecules$ formin* raindrops9. Adhesion Adhesion is the propert! that causes unli-e substances to sticto*ether 8e* the raindrops stic- on a washin* line9.

Question Number. 13. 13. O!*en has a valenc! of. Option A. %. Option B. . Option C. 4. Correct Answer is. %.

Eplanation. O!*en has  electrons in its outer shell. he valenc! is the number of electrons in the outer shell if that number is , or less. (f there t here are more than , electrons$ the valenc! is 4 minus the number of electrons. (n this case 4 "  # %.

Question Number. 1,. he further from the nucleus the shells are in an atom. Option A. the shells retain the same spacin* from each other. Option B. the closer the shells *et to each other. Option C. the further the shells *et from each other. Correct Answer Answer is. the further the shells *et from each other. Eplanation. he *ap between the ;ener*! levels; reduces$ but the ph!sical *ap increases sli*htl!. http0www.1 http0www.1stardrive.comsolarchem.htm stardrive.comsolarchem.htm

Question Number. 1/. 1/. &hat determines an element;s identit!'. Option A. he number of neutrons. Option B. he number of electrons. Option C. he number of protons. Correct Answer is. he number of protons. Eplanation. N(). http0en.wi-ipedia.or*wi-iAtomic2number

Question Number. 1. 1. An isotope of an element will have moreless 222222222 than usual. Option A. electrons. Option B. neutrons. Option C. protons. Correct Answer is. neutrons. Eplanation. N(). http0en.wi-ipedia.or*wi-i(sotope

Question Number. 15. 15. he smallest part of an element is. Option A. a compound. Option B. an atom. Option C. a molecule. Correct Answer is. an atom. Eplanation. N().

Question Number. 14. 14. he nucleus of an atom contains. Option A. protons and electrons. Option B. protons and neutrons. Option C. electrons and neutrons. Correct Answer is. protons and neutrons. Eplanation. N().

Question Number. 16. &hat is atomic mass'. Option A. Number of neutrons. Option B. Number of protons plus the number of neutrons. Option C. Number of protons. Correct Answer is. Number of protons plus the number of neutrons. Eplanation. N().

Question Number. %:. %:. A solid melted into a li7uid will ta-e up. Option A. less space. Option B. the same amount of space. Option C. more space. Correct Answer is. less space. Eplanation. &hen a solid melts$ its volume decreases " and then be*ins to increase a*ain as the temperature of the li7uid rises.

Question Number. %1. &hat form of heat is used to turn a solid into a li7uid'. Option A. specific heat. Option B. coefficient of heat. Option C. heat of fusion. Correct Answer is. heat of fusion. Eplanation.
Question Number. %%. %%. Chan*e from solid to *as state without *oin* throu*h li7uid state is called. Option A. transformation. Option B. sublimation. Option C. state leap.

Correct Answer is. sublimation. Eplanation. =ublimation is when a solid vapourises without first meltin*.

Question Number. %3. &hat is the smallest particle of matter that can eist in nature'. Option A. A molecule. Option B. An isotope. Option C. An atom. Correct Answer is. An atom. Eplanation. An atom is the smallest particle of matter that can eist in nature.

Question Number. %,. A positive ion. Option A. has etra electrons. Option B. has missin* electrons. Option C. is a radioactive isotope. Correct Answer is. has missin* electrons. Eplanation. A positive ion is an atom with missin* electrons.

Question Number. %/. he isotope of a carbon atom C1, to C1% will have. Option A. same numbers of neutrons. Option B. same numbers of protons. Option C. same number of electrons. Correct Answer is. same numbers of protons. Eplanation. An isotope is an atom with the same atomic number but different mass number. Atomic number is the number of protons. Mass number is the number of protons plus neutrons. Note0 the number of electrons can differ from one atom to another 8ma-in* ions9.

Question Number. %. (f an atom has % protons$ how man! electrons will it have'. Option A. 1. Option B. 4. Option C. %. Correct Answer is. %. Eplanation. =ince it is an ;atom; 8and not an ion9 it has the same number of electrons as protons.

Question Number. %5. A molecule with li-e atoms is said to be a. Option A. neutroid. Option B. compound. Option C. element. Correct Answer is. element. Eplanation. (f onl! one t!pe of atom is involved$ it is an element.

Question Number. %4. wo elements in the same substance is said to be a. Option A. miture. Option B. element. Option C. compound. Correct Answer is. compound. Eplanation. A compound is a substance formed b! chemical reaction between % or more elements. A miture could be % or more compounds. A tenuous 7uestion.

Question Number. %6. he number of protons in an atom is e7ual to the number of. Option A. electrons. Option B. neutrons. Option C. mass number. Correct Answer is. electrons. Eplanation. No. of protons # No. of electrons$ or it is not an atom.

Question Number. 3:. he char*e of an electron is. Option A. neutral. Option B. ne*ative. Option C. positive. Correct Answer is. ne*ative. Eplanation. Electrons are ne*ative.

Question Number. 31. A valance electron is an electron. Option A. in the innermost shell. Option B. in the outermost shell. Option C. which is not within an atom.

Correct Answer is. in the outermost shell. Eplanation. he outer shell is the valence shell.

Question Number. 3%. Molecules of unli-e atoms are combined b! their. Option A. adhesive force. Option B. ma*netic force. Option C. cohesive force. Correct Answer is. adhesive force. Eplanation. Cohesion is the propert! that causes li-e substances to clin* to*ether 8e* water molecules$ formin* raindrops " from ;cohesion; meanin* to stic- to*ether9. Adhesion is the propert! that causes unli-e substances to stic- to*ether 8e* the raindrops stic-$ or ;adhere to; a washin* line9.

Question Number. 33. &hat is the difference between h!dro*en$ deuterium and tritium'. Option A. he number of electrons. Option B. he number of protons. Option C. he number of neutrons. Correct Answer is. he number of neutrons. Eplanation. here are three isotopes of the element h!dro*en0 h!dro*en$ deuterium$ and tritium. he! each have one sin*le proton 8>#19$ but differ in the number of their neutrons. +!dro*en has no neutron$ deuterium has one$ and tritium has two neutrons.

Question Number. 3,. he smallest material in the universe is. Option A. an ion. Option B. helium. Option C. h!dro*en. Correct Answer is. h!dro*en. Eplanation. +!dro*en is the smallest -nown element$ havin* ?ust 1 electron and 1 proton and no neutrons.

Question Number. 3/. &hat is the atomic number of the element shown here'. Option A. 5. Option B. 3. Option C. ,.

Correct Answer is. 3. Eplanation. he atomic number is the number of protons and is alwa!s the smallest number 8and !es$ the element shown is not possible9.

Question Number. 3. &hat is the mass number of the element shown here'. Option A. ,. Option B. /. Option C. 6. Correct Answer is. /. Eplanation. he mass number is the number of protons @ the number of neutrons and is alwa!s the bi**est of the % numbers.

Question Number. 35. here are solids$ li7uids and *ases present in the universe and ever! unit of theirs occup! some space. his is called. Option A. matter. Option B. compound. Option C. mass. Correct Answer is. matter. Eplanation. All material in space is -nown as matter. 8All matter ;has; mass$ but that is not what the 7uestion as-s " what is it -nown as$ not$ what does it have9.

Question Number. 34. An atom deficient of a valenc! electron is deficient. Option A. of an electron in the outer shell. Option B. of a neutron in the outer shell. Option C. of an electron in the inner shell. Correct Answer is. of an electron in the outer shell. Eplanation. he valenc! electrons are in the outer shell.

Question Number. 36. he maimum number of electrons in the second shell is. Option A. ,. Option B. 4. Option C. %. Correct Answer is. 4. Eplanation. r! the formula ;%n"s7uared;$ where ;n; is the shell number. (n this case %  8% 

%9 # 4.

Question Number. ,:. &hat does an o!*en atom consist of'. Option A. rotons$ neutrons and electrons. Option B. rotons and electrons. Option C. rotons and neutrons. Correct Answer is. rotons$ neutrons and electrons. Eplanation. All atoms have protons$ neutrons and electrons 8ecept h!dro*en$ which has no neutrons9.

Question Number. ,1. =urface molecular attraction between two different molecules is. Option A. adhesive. Option B. *ravitational. Option C. cohesive. Correct Answer is. adhesive. Eplanation. Cohesion is the propert! that causes li-e substances to clin* to*ether 8e.*. water molecules$ formin* raindrops " from ;cohesion; meanin* to stic- to*ether9. Adhesion is the propert! that causes unli-e substances to stic- to*ether 8e.*. the raindrops stic-$ or ;adhere to; a washin* line9.

Question Number. ,%. he atomic mass number is the number of. Option A. protons plus electrons. Option B. neutrons plus electrons. Option C. protons plus neutrons. Correct Answer is. protons plus neutrons. Eplanation. Mass Number is the number of protons @ neutrons.

Question Number. ,3. A catal!st in a chemical reaction does what'. Option A. Can either speed it up or slow it down. Option B. =peeds it up. Option C. =lows it down. Correct Answer is. =peeds it up. Eplanation. Official definition of ;catal!st;0 A substance that increases the rate of a chemical reaction b! reducin* the activation ener*!$ but which is left unchan*ed b! the reaction.

Question Number. ,,. &hat is the number of electrons in the inner"most shell of an atom'. Option A. ,. Option B. 4. Option C. %. Correct Answer is. %. Eplanation. he inner shell of an atom has % electrons.

Question Number. ,/. &hat form of heat is used to turn a solid into a *as'. Option A. =ensible heat. Option B. =pecific heat. Option C. )atent heat. Correct Answer is. )atent heat. Eplanation. o chan*e an! state$ the heat re7uired is called ;latent heat;.

Question Number. ,. he heat re7uired to chan*e a li7uid to a *as at constant temperature is the heat of. Option A. fusion. Option B. condensation. Option C. vaporisation. Correct Answer is. vaporisation. Eplanation. he heat re7uired to turn a li7uid into a *as 8vaporise9 is called the ;latent heat of vaporisation;.

Question Number. ,5. An atom with a full outer shell is. Option A. practicall! inert. Option B. a *ood insulator. Option C. a *ood conductor. Correct Answer is. practicall! inert. Eplanation. An atom with a full outer shell is practicall! inert.

Question Number. ,4. An element with a full valence shell is. Option A. ver! reactive.

Option B. *ood conductor. Option C. inert. Correct Answer is. inert. Eplanation. An element with a full valence shell is inert.

Question Number. ,6. A substance of two or more different atoms is. Option A. a neutrino. Option B. an isotope. Option C. a chemical compound. Correct Answer is. a chemical compound. Eplanation. A compound is two or more different atoms.

Question Number. /:. An atom with / electrons in its outer shell is. Option A. trivalent. Option B. pentavelent. Option C. covalent. Correct Answer is. trivalent. Eplanation. alenc! is the number of electrons in the outer shell 8up to ,9 or 4 minus the number of electrons in the outer shell 8over ,9.

Module 2 Physics Part 2 Question Number. /1. rotons have. Option A. no char*e. Option B. positive char*e. Option C. ne*ative char*e. Correct Answer is. positive char*e. Eplanation. rotons are positivel! char*ed.

Question Number. /%. roducin* a compound from commonl! available materials is. Option A. s!nthesis. Option B. anal!sis. Option C. bombardment. Correct Answer is. s!nthesis. Eplanation. Ma-in* a compound is called s!nthesis$ brea-in* it apart is called anal!sis.

Question Number. /3. A different number of nucleons in the nucleus of atoms would represent. Option A. semiconductor. Option B. isotopes. Option C. isotones. Correct Answer is. isotopes. Eplanation. An (sotope is an element with a ;wron*; number of neutrons.

Question Number. /,. Molecules of matter are in constant motion. he amount of vibration or motion is dependent on. Option A. temperature. Option B. volume. Option C. pressure. Correct Answer is. temperature. Eplanation. emperature produces molecular motion.

Question Number. //. &hen a chemical chan*e ta-es place$ the smallest particle indivisible in an element is called. Option A. an atom. Option B. an electron. Option C. a neutron. Correct Answer is. an atom. Eplanation. An atom is the smallest particle in an element. articles smaller than that 8neutrons$ protons$ electrons9 do not define an element.

Question Number. /. A nucleus of an atom consists of. Option A. positivel! char*ed particles. Option B. a nucleus and normall! has no overall char*e at all and so is neutral. Option C. ne*ativel! char*ed particles. Correct Answer is. positivel! char*ed particles. Eplanation. rotons are positive$ neutrons are neutral.

Question Number. /5. A compound is a. Option A. miture of more than one element which are chemicall! bonded to*ether. Option B. solution 8either li7uid or solid9 of elements or mitures of elements to form a new material. Option C. miture of more than one element which are mied to*ether. Correct Answer is. miture of more than one element which are chemicall! bonded to*ether. Eplanation. A compound is two or more elements chemicall! bonded.

Question Number. /4. A compound such as water can eist in how man! states'. Option A. %. Option B. 3. Option C. 1. Correct Answer is. 3. Eplanation. =olid$ li7uid$ *as.

Question Number. /6. =elect the correct statement from the followin*. Option A. emperature is the onl! factor which can affect the state in which matter eists. Option B. Matter can onl! eist in one of three states. Option C. As temperature rises a solid will alwa!s become a li7uid and then a *as. Correct Answer is. Matter can onl! eist in one of three states. Eplanation. =olid$ li7uid$ *as. ressure also affects the state in which matter eists.

Question Number. :. (sotopes of an element have. Option A. a different atomic number. Option B. the same number of neutrons but a different number of protons. Option C. the same number of protons but a different number of neutrons. Correct Answer is. the same number of protons but a different number of neutrons. Eplanation. N().

Question Number. 1. Neutrons have. Option A. no char*e. Option B. a positive char*e. Option C. a ne*ative char*e. Correct Answer is. no char*e.

Eplanation. N().

Question Number. %. Atomic MA== number is the number of. Option A. protons. Option B. protons and neutrons. Option C. electrons. Correct Answer is. protons and neutrons. Eplanation. Mass number is the total number of items in the nucleus 8protons and neutrons9.

Question Number. 3. +ow man! electrons does an D=D orbital hold'. Option A. . Option B. 4. Option C. %. Correct Answer is. %. Eplanation. +ow man! electrons does an D=D orbital hold'.

Question Number. ,. he number of electrons in a stable atom e7uals. Option A. the number of neutrons in the nucleus. Option B. the number of protons and neutrons in the nucleus. Option C. the number of protons in the nucleus. Correct Answer is. the number of protons in the nucleus. Eplanation. Electrons # rotons 8to cancel the electrical char*e9.

Question Number. /. An isotope of an element has. Option A. the same atomic number but a different mass number. Option B. the same mass number but a different atomic number. Option C. a different mass and atomic number. Correct Answer is. the same atomic number but a different mass number. Eplanation. N(). http0en.wi-ipedia.or*wi-i(sotope

Question Number. . he mass number of an element is based on. Option A. the total number of protons and neutrons in its nucleus. Option B. the number of protons in its nucleus.

Option C. the number of neutrons in its nucleus. Correct Answer is. the total number of protons and neutrons in its nucleus. Eplanation. N(). http0chemistr!.about.comlibrar!*lossar!bldef/5:,:.htm

Question Number. 5. he atomic wei*ht of all atoms is related to. Option A. +!dro*en. Option B. Carbon. Option C. +elium. Correct Answer is. Carbon. Eplanation. N(). http0education.!ahoo.comreferencedictionar!entr!atomic%:wei*ht

Question Number. 4. he chemical bondin* of two or more elements is called. Option A. chemical anal!sis. Option B. chemical s!nthesis. Option C. chemical fusion. Correct Answer is. chemical s!nthesis. Eplanation. N(). http0en.wi-ipedia.or*wi-iChemical2s!nthesis

Question Number. 6. wo or more elements that are chemicall! bonded to*ether and have an even mass distribution form a. Option A. miture. Option B. substance. Option C. chemical compound. Correct Answer is. chemical compound. Eplanation. &hen elements bond chemicall!$ the! ma-e a compound.

Question Number. 5:. An atom that *ains one or more additional electrons is called. Option A. a ne*ative ion. Option B. a positive ion. Option C. an isotope. Correct Answer is. a ne*ative ion. Eplanation. Electrons are ne*ativel! char*ed$ so additional electrons ma-e an atom into a ne*ative ion.

Question Number. 51. (onic bondin* involves. Option A. electron sharin*. Option B. attraction to a free electron cloud. Option C. electron transfer. Correct Answer is. electron transfer. Eplanation. (onic bondin* is formed when electrons are transferred.

Question Number. 5%. Non"metals form. Option A. covalent bonds. Option B. ionic bond. Option C. metallic bonds. Correct Answer is. covalent bonds. Eplanation. Non"metals usuall! form covalent bonds.

Question Number. 53. Brownian Movement describes. Option A. Brownian Movement describes. Option B. the attraction of electrons. Option C. the motion of molecules. Correct Answer is. the motion of molecules. Eplanation. N(). http0www.h!perdictionar!.comdictionar!Brownian@movement

Question Number. 5,. Elements on the etreme ri*ht of the periodic table are. Option A. Metals. Option B. Non"metals. Option C. ransition metals. Correct Answer is. Non"metals. Eplanation. N(). http0science.howstuffwor-s.comatom4.htm

Question Number. 5/. O!*en$ atomic number 4 is. Option A. trivalent. Option B. univalent. Option C. bivalent. Correct Answer is. bivalent.

Eplanation. N(). http0www.sil.or*lin*uisticsFlossar!Of)in*uisticerms&hat(salenc!.htm

Question Number. 5. he atomic number of the atom of an element is based on. Option A. the number of neutrons in to nucleus. Option B. the number of protons in its nucleus. Option C. the total number of protons and neutrons in its nucleus. Correct Answer is. the number of protons in its nucleus. Eplanation. N(). http0www.h!perdictionar!.comdictionar!atomic@number

Question Number. 55. &ater is. Option A. an element. Option B. a miture. Option C. a compound. Correct Answer is. a compound. Eplanation. N().

Question Number. 54. he Mass of a roton is approimatel!. Option A. e7ual to the mass of an electron. Option B. e7ual to the relative mass of a molecule. Option C. %::: times *reater than the mass of an electron. Correct Answer is. %::: times *reater than the mass of an electron. Eplanation. N().

Question Number. 56. Noble *ases are 2222222 and 2222222 and have a full outer shell of electrons. Option A. fluorine and neon. Option B. sulphur and neon. Option C. helium$ neon$ ar*on. Correct Answer is. helium$ neon$ ar*on. Eplanation. N(). http0www.chemicalelements.com*roupsnoble*ases.html

Question Number. 4:. (f a h!dro*en atom has % neutrons and 1 proton what -ind of water

would !ou *et'. Option A.
Question Number. 41. A ma?orit! of an atom;s mass is in the. Option A. compound. Option B. isotope. Option C. nucleus. Correct Answer is. nucleus. Eplanation. N(). http0en.wi-ipedia.or*wi-iAtom

Module 2 Physic Page 3 %.1. Mechanics G =tatics.

Question Number. 1. An insulator has its electrons. Option A. ti*htl! bound. Option B. loosel! bound. Option C. otall! free from the atoms. Correct Answer is. ti*htl! bound. Eplanation. Aircraft Electricit! H Electronics /th edition I Eismin.

Question Number. %. he centre of *ravit! of an aircraft is ad?usted b! two wei*hts$ 1: -* and / c-* plaed ,m and % m aft of the c of *. o what position must a %: -* wei*ht be added to balance the c of *'. Option A. %./m. Option B. ,m. Option C. %m. Correct Answer is. %./m. Eplanation. 81:  ,9 @ 8/  %9 # %:  ' ,:@1:#%:  ' ' # %./m.

Question Number. 3.
Question Number. ,. he 7uadrature component of a vector is. Option A. ,/J to the ori*inal. Option B. 6:J to the ori*inal. Option C. 14:J to the ori*inal. Correct Answer is. 6:J to the ori*inal. Eplanation. N().

Question Number. /. 1 Newton is e7ual to. Option A. 1 -ilo*ram meter per second per second. Option B. 1 -ilo*ram of force. Option C. 1 ?oule per second. Correct Answer is. 1 -ilo*ram meter per second per second. Eplanation. Kemember Newtons %nd law ;<#ma;. &ell$ ;m; is in -ilo*rams$ ;a; is in metres per second s7uared 8or meters per second per second9 so put the two to*ether and ;<; isL.

Question Number. . he =( unit of mass is the. Option A. metre 8m9. Option B. pound 8lb9. Option C. -ilo*ram 8-*9. Correct Answer is. -ilo*ram 8-*9. Eplanation. N().

Question Number. 5. A slu* is a unit of. Option A. speed.

Option B. mass. Option C. wei*ht. Correct Answer is. mass. Eplanation. A ver! old unit of mass " e7ual to 1,. -*.

Question Number. 4. (f an ob?ect in air is submer*ed in a li7uid or a *as its wei*ht will. Option A. increase. Option B. decrease. Option C. remain the same. Correct Answer is. remain the same. Eplanation. thin* that can chan*e the wei*ht of an ob?ect is the *ravitational field it is in.

Question Number. 6. (f a material is loaded ecessivel! and is permanentl! deformed$ it is said to be. Option A. stretched. Option B. stressed. Option C. strained. Correct Answer is. strained. Eplanation. =train # etension  ori*inal len*th 8=tress # force  area9.

Question Number. 1:. he =( unit of force is the. Option A. Newton 8N9. Option B. Metre 8m9. Option C. ascal 8a9. Correct Answer is. Newton 8N9. Eplanation. N().

Question Number. 11. he formula for calculatin* stress is. Option A. load divided b! cross sectional area. Option B. area divided b! load. Option C. load multiplied b! cross sectional area. Correct Answer is. load divided b! cross sectional area. Eplanation. N().

Question Number. 1%. =tress is *iven b!. Option A. force per unit area. Option B. etension per ori*inal len*th. Option C. force per ori*inal len*th. Correct Answer is. force per unit area. Eplanation. N().

Question Number. 13. he force which opposes twistin* deformation is. Option A. torsion. Option B. strain. Option C. shear. Correct Answer is. torsion. Eplanation. A torsional force opposes twistin*.

Question Number. 1,. A force perpendicular to a beam produces what t!pe of stress'. Option A. compressive. Option B. shear. Option C. tensile. Correct Answer is. shear. Eplanation. perpendicular to a beam 8such a s a man on a divin* board9 produces bendin* and shear stress.

Question Number. 1/. he etension of a sprin* can be determined usin*. Option A. Charles; )aw. Option B. Newton;s %nd )aw. Option C. +oo-e;s )aw. Correct Answer is. +oo-e;s )aw. Eplanation. +oo-e;s law is ;etension is proportional to force;.

Question Number. 1. &hen a steel bar is overstressed$ what is the name of the point at which it does not return to its ori*inal form after the load is released'. Option A. ltimate point. Option B. ield point.

Option C. oun*;s modulus. Correct Answer is. ield point. Eplanation. N().

Question Number. 15. wo couples with ma*nitude < act a*ainst each other. he resultant will be. Option A. "%<. Option B. %<. Option C. :. Correct Answer is. :. Eplanation. A ;couple; is % forces actin* in the same rotational direction an e7ual distance from a pivot point 8li-e turnin* a die holder9. wo couples in opposition will cancel each other.

Question Number. 14. he hei*ht of mercur! re7uired to *ive 1 bar is. Option A. 5:: mm. Option B. 1::: mm. Option C. 5: mm. Correct Answer is. 5: mm. Eplanation. 1 bar is almost atmospheric pressure.

Question Number. 16. A vessel has %/ ml of water which produces 1: -a. (f another 1%/ ml of  water is added$ what will be the pressure in the vessel'. Option A. ,: -a. Option B. /: -a. Option C. : -a. Correct Answer is. : -a. Eplanation. pressure # densit!  *ravit!  hei*ht. %/ml @ 1%/ml # 1/:ml or  times. =o   hei*ht #   pressure.

Question Number. %:. wo h!draulic ?ac-s with different diameters have the same fluid pressures enterin* at the same rate. he! will etend at. Option A. the same rate until the smaller ?ac- becomes full. Option B. the same rate. Option C. different rates.

Correct Answer is. different rates. Eplanation. diameter will have the *reater force. he ;trade"off; for this is that it will move slower.

Question Number. %1. &hat load can be lifted on ?ac- B'. Option A. 3::N. Option B. %::N. Option C. 1::N. Correct Answer is. 1::N. Eplanation. 1: times the area$ then it can lift 1: times the load.

Question Number. %%. he most common method of epressin* pressure is in. Option A. inch pounds per s7uare inch. Option B. *rams per s7uare inch. Option C. pounds per s7uare inch. Correct Answer is. pounds per s7uare inch. Eplanation. ressure is usuall! measured in ounds per =7uare (nch 8=(9.

Question Number. %3. he difference between two pressures is. Option A. vacuum pressure. Option B. differential pressure. Option C. static pressure. Correct Answer is. differential pressure. Eplanation. ifferential pressure is the difference between two pressures 8such as inside and outside the aircraft cabin9.

Question Number. %,. &hat tor7ue loadin* would !ou appl! to a nut if the force is /: lbs$ eerted % feet from its ais'. Option A. 1:: lbs.ft. Option B. :: lbs.ft. Option C. %/1 lbs.ft. Correct Answer is. 1:: lbs.ft. Eplanation. or7ue loadin* # force  distance.

Question Number. %/. (n a ?ac- with a ram onl! on one side and h!draulic fluid applied from both sides. Option A. a condition of h!draulic loc- eists and no movement will ta-e place. Option B. the ram will move opposite to the side where the ram is due to pressure actin* on differential areas. Option C. the ram will move to the side where the ram is$ due to pressure actin* on differential areas. Correct Answer is. the ram will move opposite to the side where the ram is due to pressure actin* on differential areas. Eplanation. he non"ram side has a *reater area$ so the ram will be pushed from that side to the ram side.

Question Number. %. sin* the same h!draulic pressure$ the force applied b! a h!draulic  ?ac- of , s7. inch piston area. Option A. will be half that applied b! a similar ?ac- of % s7. inch piston area. Option B. will be e7ual to that applied b! a similar ?ac- of % s7. inch piston area. Option C. will be twice that applied b! a similar ?ac- of % s7. inch piston area. Correct Answer is. will be e7ual to that applied b! a similar ?ac- of % s7. inch piston area. Eplanation.
Question Number. %5. A pressure of 1:: =( acts on two ?ac-s in a h!draulic s!stem$ havin* piston areas % s7 in and , s7 in. Option A. the smaller ?ac- will eert a force of /: lb and the lar*er a force of %/ lb. Option B. the smaller ?ac- will eert a force of %:: lb and the lar*er a force of ,:: lb. Option C. the two ?ac-s will eert the same force. Correct Answer is. the smaller ?ac- will eert a force of %:: lb and the lar*er a force of ,:: lb. Eplanation.
Question Number. %4. he purpose of an accumulator in a h!draulic s!stem is to. Option A. collect air from the h!draulic fluid$ thus reducin* the re7uirement for fre7uent bleedin*. Option B. relieve ecess pressure. Option C. store h!draulic fluid under pressure. Correct Answer is. store h!draulic fluid under pressure.

Eplanation. An accumulator stores h!draulic pressure for use when the main pressure pump fails.

Question Number. %6. (f the h!draulic s!stem accumulator has a low air pressure$ it will cause. Option A. rapid pressure fluctuations durin* operation of services. Option B. rapid movement of the operatin* ?ac-s. Option C. slow build up of pressure in the s!stem. Correct Answer is. rapid pressure fluctuations durin* operation of services. Eplanation. he secondar! purpose of an accumulator is to damp out pressure fluctuations.

Question Number. 3:. he specific tor7ue loadin* for a bolt is /: lbs.ins but an etension of % inches is needed to reach the bolt in addition to the 4 inches tor7ue wrench. &hat will the actual readin*'. Option A. /, lb.ins. Option B. ,: lb.ins. Option C. : lb.ins. Correct Answer is. ,: lb.ins. Eplanation. New tor7ue readin* # desired tor7ue  )8@)9. /:  41: # ,: lb.ins.

Question Number. 31. (f 1/:: psi h!draulic pressure is pumped into an accumulator$ with a pre"char*e air pressure of 1::: psi the *au*e will read. Option A. %/:: psi. Option B. 1/:: psi. Option C. 1::: psi. Correct Answer is. 1/:: psi. Eplanation. he accumulator pressure *au*e reads the h!draulic pressure onl! when it is above the char*e pressure.

Question Number. 3%. oun*;s modulus is. Option A. stress  strain. Option B. strain  stress. Option C. stress  strain. Correct Answer is. stress  strain.

Eplanation. oun*;s Modulus 8E9 is the ratio =tress  =train.

Question Number. 33. A c!linder filled with water to half a metre will eert a pressure of. Option A. ,.6 a. Option B. ,6:: a. Option C. ,6 a. Correct Answer is. ,6:: a. Eplanation. ressure # densit!  *ravit!  hei*ht # 1::: 8for water9  1:  :./ # /::: a. Answer is ,6:: a because *ravit! is sli*htl! less than 1: 86.41 to be eact9.

Question Number. 3,. A mass of 1:-* placed % metres awa! from a pivot will have a moment of. Option A. 16 NM. Option B. /: NM. Option C. %: NM. Correct Answer is. 16 NM. Eplanation. 1: -* # 1:  6.4 # 64N. Moment # force  radius # 64  % # 16 Nm.

Question Number. 3/. %/ litres of fuel eerts a pressure of 1:Ia. (f a further 1%/ litres is added$ the pressure will now be. Option A. /: -a. Option B. : -a. Option C. ,: -a. Correct Answer is. : -a. Eplanation. otal
Question Number. 3. 1::: lbin % is in an accumulator. (f 3::: lbin % of h!draulic fluid is pumped in$ what is the pressure on the air side'. Option A. 3::: lbin %. Option B. ,::: lbin %. Option C. 1::: lbin %. Correct Answer is. 3::: lbin%. Eplanation. he piston does not move until the h!draulic pressure eceeds 1::: psi.
then on$ the air and h!draulic pressures are e7ual 8at all times that the piston is off its stops9.

Question Number. 35. A fractional decrease in volume of a material when it is compressed is a function of the. Option A. compressive strain. Option B. compressive strain. Option C. bul- modulus. Correct Answer is. bul- modulus. Eplanation. Bul- modulus # ratio of chan*e in pressure to the fractional volume compression.

Question Number. 34. A ram has a piston with % in %. Another ram with a piston of , in % will provide. Option A. the same force. Option B. double the force. Option C. s7uare the force. Correct Answer is. double the force. Eplanation. ouble the area # double the force. 8+owever$ if the 7uestion said double the radius or diameter$ the force is a s7uare of that$ i.e ,9.

Question Number. 36. +ow much force is eerted b! piston if it is sub?ected to a pressure of 3::: a and has surface area of %./ m %'. Option A. 5/:: N. Option B. 3::: N. Option C. 1%:: N. Correct Answer is. 5/:: N. Eplanation.
Question Number. ,:. A force of 1: million NewtonPs is epressed numericall! as. Option A. 1: MN. Option B. 1: MN. Option C. 1 MN. Correct Answer is. 1: MN.

Eplanation. million Newtons # 1: MN 8Me*aNewtons9.

Question Number. ,1. A millilitre is e7ual to. Option A. one million litres. Option B. one millionth of a litre. Option C. one thousandth of a litre. Correct Answer is. one thousandth of a litre. Eplanation. A millilitre # 11::: litre.

Question Number. ,%. (f a s7uare has an area of 6m %$ one side is. Option A. 3 m. Option B. 3 m%. Option C. 3 s7. m. Correct Answer is. 3 m. Eplanation. 3 m  3m # 6 m %.

Question Number. ,3. A vector 7uantit! is a 7uantit! which. Option A. possesses sense$ ma*nitude and direction. Option B. possesses direction onl!. Option C. possesses sense onl!. Correct Answer is. possesses sense$ ma*nitude and direction. Eplanation. A vector 7uantit! has ma*nitude AN direction. 8sense and direction are the same thin*9.

Question Number. ,,. One atmosphere is e7ual to. Option A. 1.%% -*m %. Option B. 1,.5 lbfin %. Option C. %4.6 inches of +*. Correct Answer is. 1,.5 lbfin%. Eplanation. atmosphere # 1,.5 pounds"force 8lbf9 per s7uare inch.

Question Number. ,/. =train is calculated b!.

Option A. Ori*inal )en*th  Etension. Option B. Etension  Ori*inal )en*th. Option C. Ori*inal )en*th  Etension. Correct Answer is. Etension  Ori*inal )en*th. Eplanation. =train # chan*e in len*th divided b! ori*inal len*th.

Question Number. ,. &hen a twistin* force is applied to a bolt$ what stress is eerted on to the head'. Option A. =hear. Option B. Compressive. Option C. orsion. Correct Answer is. orsion. Eplanation. A twistin* force applied to a bolt produces ;torsion stress; 8which technicall! is a form of shear9.

Question Number. ,5. &hen !ou overstress a steel bar$ what is the point called where it does not return to its ori*inal form'. Option A. lastic limit. Option B. Elasticit! limit. Option C. eformation limit. Correct Answer is. Elasticit! limit. Eplanation. he point at which the stressed bar does not return to its ori*inal form is called the ;elastic limit;.

Question Number. ,4. he formula for calculatin* shear is. Option A. force  cross"sectional area. Option B. force  area. Option C. force  area parallel to the force. Correct Answer is. force  area parallel to the force. Eplanation.
Question Number. ,6. A force 1: N is placed % Meters from a pivot point$ what is the moment'. Option A. %: Nm.

Option B. %: Nm. Option C. 4: Nm. Correct Answer is. %: Nm. Eplanation. N at % m distance produces 1:  % # %: Nm.

Question Number. /:. (f a tensile load is placed on a bar$ it will. Option A. bend. Option B. crush. Option C. stretch. Correct Answer is. stretch. Eplanation. tensile load placed on a bar will stretch it.

Module 2 Page 4

Question Number. /1. &hat atmospheric conditions will cause the true landin* speed of an aircraft to be hi*hest'. Option A. )ow temp$ hi*h humidit!. Option B. +ead wind$ low humidit!. Option C. +i*h temp$ hi*h humidit!. Correct Answer is. +i*h temp$ hi*h humidit!. Eplanation. )ift is least at low densit!. ensit! is lowest at hi*h temperature and hi*h humidit!.

Question Number. /%. =tructures desi*ned to withstand compression are called a. Option A. tie. Option B. strut. Option C. beam. Correct Answer is. strut. Eplanation. ension " ie$ Compression " =trut$ Bendin* " Beam.

Question Number. /3. 1 ascal e7uals. Option A. 1:/ Nm %. Option B. 1 Nm %.

Option C. 1: Nm. Correct Answer is. 1 Nm%. Eplanation. 1 a # 1 Nm %.

Question Number. /,. he addition of % different vectors to produce another vector is called. Option A. component. Option B. resolution. Option C. resultant. Correct Answer is. resultant. Eplanation. he resultant of two vectors. he mathematical process is actuall! called ;composition;.

Question Number. //. wo items wei*hin* 11-* and 4-* are placed %m and 1m respectivel! aft of the C of F of an aircraft. +ow far forward of the C of F must a wei*ht of 3:-* be placed so as not to chan*e the C of F'. Option A. %m. Option B. 1./m. Option C. 1m. Correct Answer is. 1m. Eplanation. otal moment # 811%9 @ 8419 # 3:-*m. he 3: -* mass must be placed such that 3:-*  Rm # 3: -* m. +ence R # 1m.

Question Number. /. A point at which the total force of a bod! acts is -nown as the. Option A. centre of *ravit!. Option B. point of e7uilibrium. Option C. centre of mass. Correct Answer is. centre of *ravit!. Eplanation. (f b! force the! mean ;wei*ht; then it is Centre of Fravit!.

Question Number. /5. A load of ::N is suspended b! a cable. (f the stress in the cable is said to be limited to 1/Nmm % the minimum cross sectional area of the cable must be. Option A. :.:%/mm %. Option B. 6:::mm %.

Option C. ,:mm %. Correct Answer is. ,:mm%. Eplanation. =tress #
Question Number. /4. A sprin*$ operatin* within its elastic ran*e$ shortens b! :mm when a load of ,4:N is applied to it. Calculate the total shortenin* when the load is increased b! 1%:N. Option A. 4%mm. Option B. ,/mm. Option C. 5/mm. Correct Answer is. 5/mm. Eplanation. ::,4:  : # 5/mm.

Question Number. /6. he c.*. of a trian*ular plate is at the intersection of. Option A. medians from a verte to the opposite side. Option B. an*le bisectors. Option C. perpendicular bisectors. Correct Answer is. medians from a verte to the opposite side. Eplanation. N().

Question Number. :. &hen a s7uare bloc- of material is pushed into a parallelo*ram$ the material is under what stress t!pe'. Option A. Compression. Option B. orsion. Option C. =hear. Correct Answer is. =hear. Eplanation. N(). http0*roups.ph!sics.umn.edudemoold2pa*edemo2*ifs1K3:2%:.F(<

Question Number. 1. A 7uantit! which has siSe but no direction is called a. Option A. =calar. Option B. Moment. Option C. ector. Correct Answer is. =calar.

Eplanation. scalar has siSe onl! 8mass$ area etc.9. A vector has siSe and direction 8velocit!$ force etc.9.

Question Number. %. he advanta*e of usin* a machine is. Option A. mechanical advanta*e of input. Option B. mechanical advanta*e of output. Option C. input wor- is less than the output wor-. Correct Answer is. mechanical advanta*e of output. Eplanation. Mechanical advanta*e is usuall! on the outp.

Question Number. 3. &hich of the followin* can transmit pressure'. Option A. )i7uids and *ases. Option B. =olids and *ases. Option C. An! matter can transmit pressure$ dependin* on temperature. Correct Answer is. )i7uids and *ases. Eplanation. N().

Question Number. ,. A moment is created b! a force of /N actin* ,m from the pivot on a uniform bar. At what distance must a force of 1:N be applied to balance the beam'. Option A. 4 m. Option B. , m. Option C. % m. Correct Answer is. % m. Eplanation. /  , # %:$ 1:  R # %: R # %m.

Question Number. /. A lever of len*th 1:/ cm is used with a fulcrum placed 1/ cm from the end bearin* the load. (ts mechanical advanta*e is. Option A. 1. Option B. 5. Option C. . Correct Answer is. . Eplanation. he OA) len*th is 1:/ cm$ so the input end is 6: cms. 6:1/ # .

Question Number. . he stress created when a material is pulled apart is called. Option A. tension. Option B. torsion. Option C. compression. Correct Answer is. tension. Eplanation. N().

Question Number. 5. he !ield point of a material is the point at which. Option A. strain becomes proportional to stress. Option B. the material ruptures or brea-s. Option C. permanent deformation ta-es place. Correct Answer is. permanent deformation ta-es place. Eplanation. N().

Question Number. 4. Assumin* constant temperature. (f a steel bar of len*th % m deforms to a len*th of %.% m under applied load. he strain is. Option A. 1.1. Option B. :.6. Option C. :.1. Correct Answer is. :.1. Eplanation. =train # EtensionOri*inal )en*th # :.%% # :.1.

Question Number. 6. A =calar 7uantit! has. Option A. sense$ ma*nitude and direction. Option B. sense and direction. Option C. ma*nitude onl!. Correct Answer is. ma*nitude onl!. Eplanation. N().

Question Number. 5:. A h!draulic piston of %./ s7uare inches produces 5/::lbf$ &hat pressure is used'. Option A. /::: =(. Option B. 3::: =(. Option C. 5::: =(.

Correct Answer is. 3::: =(. Eplanation. ressure #
Question Number. 51.
Question Number. 5%. A force of / Newtons actin* perpendicularl! at 3:: centimetres from the pivot produces a moment of. Option A. 1/:: Newton metre. Option B. 1/ Newton metre. Option C. 1./ Iilonewton millimetre. Correct Answer is. 1/ Newton metre. Eplanation. 3m  /N # 1/ Nm.

Question Number. 53. E7uilibrium of translation occurs when. Option A. downward forces e7ual upward 8reactive9 forces. Option B. cloc-wise moments e7ual countercloc-wise moments. Option C. cloc-wise forces and countercloc-wise forces are e7ual. Correct Answer is. downward forces e7ual upward 8reactive9 forces. Eplanation. ranslation is linear movement.

Question Number. 5,. he conversion factor to convert litres to pints is. Option A. :./5. Option B. 1.5. Option C. %.%. Correct Answer is. 1.5. Eplanation. N(). http0www.thetipsban-.comconvert.htm

Question Number. 5/. +!draulic pressure can be restored b!.

Option A. the use of pressureheat echan*e. Option B. compressin* the air char*e in an accumulator. Option C. compressin* the fluid in a reservoir reservoir.. Correct Answer is. compressin* the air char*e in an accumulator. Eplanation. N().

Question Number. 5. 5. &hen chec-in* a h!draulic accumulator initial air pressure$ the h!draulic s!stem pressure. Option A. should be at the normal wor-in* pressure. Option B. is not important. Option C. should be released. Correct Answer is. should be released. Eplanation. N().

Question Number. 55. 55. One -* is the mass m ass of. Option A. one litre of pure water. Option B. one pint of pure water. w ater. Option C. one *allon of pure water. Correct Answer is. one litre of pure water. Eplanation. N(). http0www. http0www.bartleb!.co bartleb!.com44/34/.html m44/34/.html

Question Number. 54. he centre of *ravit! of a trian*le is. Option A. 13 the median from the base. Option B. 13 the bisector from f rom the base. Option C. 13 the hei*ht from the base. Correct Answer is. 13 the median from the base. Eplanation. http0en.wi-ipedia.or*wi-i http0en.wi-ipedia.or*wi-irian*le rian*le

Question Number. 56. 56. A liftin* machine moves m oves with an effort$ a distance of %:: cm$ in order to raise it :./ m. he elocit! elocit! Katio is. Option A. :.%/. Option B. ,. Option C. ,:. Correct Answer is. ,.

Eplanation. istance ratio input output # %:./ # ,. elocit! ratio is same as istance ration.

Question Number. 4:. wo ectors are at 6: de*rees to each other havin* ma*nitudes of 3N and ,N. he resultant is. Option A. /N. Option B. 1N. Option C. 5N. Correct Answer is. /N. Eplanation. ectors ectors ma-e a 3","/ trian*le.

Question Number. 41. 41. &hich of the t he followin* has no units'. Option A. =train. Option B. =tress. Option C. Elasticit!. Correct Answer is. =train. Eplanation. N(). %.%. Mechanics G Iinetics.

Question Number. 1.
Question Number. %. %. A time time period of 1: microseconds is e7ual to a fre7uenc! of. Option A. 1:: -+S. Option B. 1: -+S. Option C. 1 MhS. Correct Answer is. 1:: -+S. Eplanation.
Question Number. 3. he =( unit of acceleration is the. Option A. metre per second s7uared 8ms %9. Option B. metre per second 8ms9. Option C. s7uare metre 8m %9. Correct Answer is. metre per second s7uared 8ms %9. Eplanation. N().

Question Number. ,. (f a bod! starts at rest and reaches 4, ms in 3 seconds$ its acceleration accel eration is. Option A. %4 ms %. Option B. 1, ms%. Option C. %/% ms %. Correct Answer is. %4 ms%. Eplanation. Acceleration Acceleration # chan*e in speed  time.

Question Number. /. he =( unit of velocit! is the. Option A. metre per second s7uared 8ms %9. Option B. metre per second 8ms9. Option C. metre 8m9. Correct Answer is. metre per second 8ms9. Eplanation. N().

Question Number. . . An aircraft flies 13/: nmiles in %h 1/mins. &hat is the avera*e speed'. Option A. :: nmileshour. Option B. :: mileshour. Option C. 1/: nmileshour. Correct Answer is. :: nmileshour. Eplanation. Avera*e Avera*e speed # distancetime # 13/:%.%/ # :: nmh.

Question Number. 5. 5. A sprin* sprin* etends 5 cm to the *round and bac- a*ain %: times a minute.

&hat is the period'. Option A. 5 cm. Option B. 3 seconds. Option C. 13 c!cle. Correct Answer is. 3 seconds. Eplanation.
Question Number. 4. A c!clist *oes from rest to /: ms in / seconds. &hat is the avera*e acceleration'. Option A. 1: ms %. Option B. 1% ms%. Option C. 4 ms%. Correct Answer is. 1: ms%. Eplanation. Acceleration # chan*e in speed  time.

Question Number. 6. &hat is the period of a fre7uenc! of , +S'. Option A. 4 seconds. Option B. :.%/ seconds. Option C. , seconds. Correct Answer is. :.%/ seconds. Eplanation. eriod # 1f.

Question Number. 1:. A dot rotates around the circumference of a circle. (f the vertical position of this dot is plotted on a *raph with respect to time the result will be. Option A. a linear motion. Option B. a transverse waveform. Option C. a sinusoidal waveform. Correct Answer is. a sinusoidal waveform. Eplanation. his is wh! an AC *enerator produces a sine wave fre7uenc!.

Question Number. 11. A freel! fallin* bod!$ fallin* from a hei*ht of %-m$ and assumin* * # 1:ms%$ will stri-e the *round in a time of. Option A. ,::s.

Option B. 4:s. Option C. %:s. Correct Answer is. %:s. Eplanation.
Question Number. 1%. &hat is the an*ular velocit! of a shaft rotatin* at 3::rpm in radianssecond'. Option A. 1:T radianssecond. Option B. %T radianssecond. Option C. /T radianssecond. Correct Answer is. 1:T radianssecond. Eplanation. velocit! # %T8KM9: # %T  3::: # 1:T radianssecond.

Question Number. 13. he force that acts on a bod! to cause it to rotate in a circular path is called the. Option A. centripetal force. Option B. centrifu*al force. Option C. inertia force. Correct Answer is. centripetal force. Eplanation. Centripetal; force is the force pullin* the rotatin* ob?ect towards the centre of rotation. ;Centrifu*al; force is the e7ual and opposite reaction.

Question Number. 1,. An aircraft of % metric tonnes uses 4:: -ilo?oules -inetic ener*! to ma-e an emer*enc! stop. (ts bra-es appl! a force of 1: -iloNewtons. &hat distance does it travel before it comes to a stop'. Option A. ,:m. Option B. 4::m. Option C. 4:m. Correct Answer is. 4:m. Eplanation. Ener*! #
Question Number. 1/. A bod! rotatin* at an an*ular velocit! of / radianssec$ with a radius of

/ metres has a speed of. Option A. /T metres per second. Option B. / metres per second. Option C. %/ metres per second. Correct Answer is. %/ metres per second. Eplanation. velocit! # Kadius  Ome*a 8Ome*a # radianssec9.  # /  / # %/ ms.

Question Number. 1. A mass of ,:: -* moves %5metres$ with a force of /,N$ what is the worproduced'. Option A. 1,/4 U. Option B. /43.% IU. Option C. 1:.1 IU. Correct Answer is. 1,/4 U. Eplanation. &or- #
Question Number. 15. A mass on a sprin* nearl! hits the *round %: times a minute$ its fre7uenc! is. Option A. 3 c!cles per second. Option B. 13 c!cle per second. Option C. %: c!cles per second. Correct Answer is. 13 c!cle per second. Eplanation. c!cles per minute # %:: c!cles per second # % # 13 c!cle per second.

Question Number. 14. A bod! travellin* at %: ms accelerates to 3 ms in 4 seconds$ what is its acceleration'. Option A. 4 ms%. Option B. , ms%. Option C. % ms%. Correct Answer is. % ms%. Eplanation.  # u @at 3 # %: @ 4a 3"%: # 4a 14 # a.

Question Number. 16. A bod! dropped from 1: m will hit the *round in.

Option A. % seconds. Option B. :.% seconds. Option C. 1.,1 second. Correct Answer is. 1.,1 second. Eplanation. s # ut @ 1%at %. a-e s # 1:$ u # :$ a # * # 1:. Calculate t. 8Kemember that :  t # :9.

Question Number. %:. &hat is the rate of *ravit!'. Option A. 1%.5 ms %. Option B. :.641 ms %. Option C. 6.41 ms %. Correct Answer is. 6.41 ms%. Eplanation. Fravit! # 6.41 ms %.

Question Number. %1. An ob?ect travels 14 -m in 1 minute 3: seconds. &hat is its avera*e speed'. Option A. %:: ms. Option B. %5: ms. Option C. 1:: ms. Correct Answer is. %:: ms. Eplanation. Avera*e speed # distancetime # 14::: metres  6: seconds # %:: ms.

Question Number. %%. 1:: m is approimatel!. Option A. %%: !ards. Option B. 1:6 !ards. Option C.  !ards. Correct Answer is. 1:6 !ards. Eplanation. m # 3.3 ft. 1:: m # 33: ft. 3 ft # 1 !d so 33:3 # 11: !ards.

Question Number. %3. A car moves over a distance of / miles at stead! speed in 1: minutes. &hat is the speed'. Option A. 3: mph. Option B. 1/ mph.

Option C. : mph. Correct Answer is. 3: mph. Eplanation. in 1: mins$ 1: miles in %: mins$ 1/ miles in 3: mins$ 3: miles in 1 hr.

Question Number. %,. A spaceship travels a distance of ,4:$::: miles in % da!s. &hat is its speed'. Option A. ,4$::: mph. Option B. 3$::: mph. Option C. 1:$::: mph. Correct Answer is. 1:$::: mph. Eplanation. ,4:$:::,4 # 1:$::: M+.

Question Number. %/. A c!clist covers a distance of 1$::: m at a constant speed in 6: seconds$ &hat is his speed'. Option A. /: ms. Option B. 1%./ ms. Option C. 11.1 ms. Correct Answer is. 11.1 ms. Eplanation. 1:::m6:secs # 11.1 ms

Module 2 pAGE 5 Question Number. %/. A c!clist covers a distance of 1$::: m at a constant speed in 6: seconds$ &hat is his speed'. Option A. /: ms. Option B. 1%./ ms. Option C. 11.1 ms. Correct Answer is. 11.1 ms. Eplanation. 1:::m6:secs # 11.1 ms.

Question Number. %. +ow lon* will it ta-e a car movin* at : -mhr to travel 6: -m'. Option A. ,: minutes. Option B. 5/ minutes. Option C. 6: minutes. Correct Answer is. 6: minutes.

Eplanation. -m # 1./  :$ therefore at : -mh it will ta-e 1./ hours # 6: mins.

Question Number. %5. An aircraft travels at /:: -mhr for 3: minutes at stead! speed. +ow far does it move in that time'. Option A. /:: -m. Option B. 1::: -m. Option C. %/: -m. Correct Answer is. %/: -m. Eplanation. /:: -mh for 3: ms # a distance of %/: -m.

Question Number. %4. &hich of the followin* affect the velocit! of an ob?ect'. Option A. =peed and direction. Option B. =peed and distance. Option C. =peed and mass. Correct Answer is. =peed and direction. Eplanation. elocit! is a vector 8it has ma*nitude " speed$ and direction9.

Question Number. %6. Acceleration involves. Option A. chan*e in speed or direction of movement. Option B. chan*e of position with time. Option C. stead! speed over a fied period of time. Correct Answer is. chan*e in speed or direction of movement. Eplanation. Acceleration is a vector 8it has ma*nitude as well as direction9.

Question Number. 3:. &hat acceleration is produced if a mass increases speed from rest to 1: ftsec in / seconds'. Option A. % ftsec %. Option B. /: ftsec %. Option C. :./ ftsec %. Correct Answer is. % ftsec%. Eplanation. v # u @ at; where u # :$ v # 1:$ t # /$ so a # vt # 1:/ # %.

Question Number. 31. A car travellin* at a speed of / ms accelerates at the rate of 1 ms%. +ow lon* will it ta-e to reach a speed of %: ms'. Option A. 1/ secs. Option B. 1: secs. Option C. %: secs. Correct Answer is. 1/ secs. Eplanation. he car *ains 1 ms ever! second$ so to add 1/ ms it will ta-e 1/ seconds.

Question Number. 3%. NewtonPs laws of motion appl! to. Option A. solid substances onl!. Option B. all substances irrespective of state. Option C. *ases and li7uids onl!. Correct Answer is. all substances irrespective of state. Eplanation. Newtons laws appl! to solids$ li7uids and *ases.

Question Number. 33. &hich of NewtonPs )aws appl! most directl! to an aircraft which is acceleratin* down a runwa!'. Option A. he 3rd law. Option B. he %nd law. Option C. he 1st law. Correct Answer is. he %nd law. Eplanation. echnicall!$ all of Newton;s laws appl! but the word acceleratin* indicates the! are loo-in* for the second law "
Question Number. 3,. &hich of NewtonPs )aws appl! most directl! to a car which is slowin* down due to the bra-in* action'. Option A. he 1st law. Option B. he 3rd law. Option C. he %nd law. Correct Answer is. he %nd law. Eplanation. he car is deceleratin* therefore it is obe!in* the second law "
Question Number. 3/. < # ma is an e7uation which epresses.

Option A. NewtonPs 1st law. Option B. NewtonPs %nd law. Option C. NewtonPs 3rd law. Correct Answer is. NewtonPs %nd law. Eplanation. Newton;s second law is < # ma 8
Question Number. 3. &hat force is re7uired to produce an acceleration of / ms % on a mass of % -*'. Option A. %./ N. Option B. 1: N. Option C. /: N. Correct Answer is. 1: N. Eplanation. < # ma # %  / # 1: Newtons 8
Question Number. 35. (f a force of 1: lbf produces an acceleration of %./ ftsec %$ on what mass is it actin*'. Option A. , slu*s. Option B. , lb. Option C. %/ slu*s. Correct Answer is. , slu*s. Eplanation. < # ma$ 1: # m  %./$ m # 1:%./ # , slu*s.

Question Number. 34. &hat is acceleration'. Option A. Kate of chan*e of velocit!. Option B. Kate of chan*e of movement. Option C. Kate of chan*e of position. Correct Answer is. Kate of chan*e of velocit!. Eplanation. Acceleration is rate of chan*e of velocit!.

Question Number. 36. (n a *ear train the driver has 1:: ( and the driven has /: (. Option A. he driven rotates twice as fast. Option B. he driver and driven rotate at the same speed. Option C. he driven rotates half as fast.

Correct Answer is. he driven rotates twice as fast. Eplanation. smaller wheel rotates at the faster speed 8of a ratio e7ual to their diameters9.

Question Number. ,:. An aircraft of % metric tonnes lands with ,:: -ilo?oules of ener*!$ 1: -iloNewtons of force is applied at the bra-es$ how far does the aircraft ta-e to stop'. Option A. ,: M. Option B. ,:: M. Option C. 4:: M. Correct Answer is. ,: M. Eplanation. &or- done #
Question Number. ,1. A radar rotates 1 revolution each 3: seconds and uses 1:U of ener*! each revolution. +ow man! ?oules does it use in a da!'. Option A. %4.4 -U. Option B. 5%: -U. Option C. 5%:: -U. Correct Answer is. %4.4 -U. Eplanation. #% 4 : # 1%: revshour # 1%: 4 %, # %44: revsda!. %44: 4 1: # %44:: Uoules # %4.4 -U.

Question Number. ,%. A li*ht aircraft flies in a semi"circle from point A to point B. (f the circle has a radius of %:-m and the time ta-en is 3: minutes$ the avera*e speed is. Option A. 1%/.5 -mh. Option B. 11: -mh. Option C. 4: -mh. Correct Answer is. 1%/.5 -mh. Eplanation. arc distance # radius  an*ular distance 8in rads9 # %:T # : -m 8appro$ ta-in* Tas 39. : -m in 3: minutes is 1%: -mh 8answer is sli*htl! more because T # 3.1,$ not 3.

Question Number. ,3. he landin* speed of an aircraft is /, ms %. (f the maimum deceleration is 3ms% the minimum len*th of runwa! re7uired is.

Option A. 1%m. Option B. ,4m. Option C. 3:m. Correct Answer is. ,4m. Eplanation. N().

Question Number. ,,. he number of radians in a semi circle are. Option A. eactl! 3. Option B. T. Option C. %T. Correct Answer is. T. Eplanation. full circle # %T radians$ so a semicircle # T radians # 3.1,%.

Question Number. ,/. he an*ular velocit! of /:: KM is$ in radsseconds is e7ual to. Option A. 1:::T radss. Option B. 4.33T radss. Option C. 1.T radss. Correct Answer is. 1.T radss. Eplanation. /::  %T: # 1:::T: # 1::T # 1..

Question Number. ,. &hich of Newton;s laws relates to the formula0
Question Number. ,5. he period of simple pendulum is. Option A. independent of its mass. Option B. lon*er for a heav! pendulum bob. Option C. lon*er on the earth than on the moon. Correct Answer is. independent of its mass. Eplanation. he onl! thin*s that affect the period of a pendulum is the len*th 8*reater len*th

# lon*er period9 and *ravit! 8*reater *ravit!# shorter period9.

Question Number. ,4. A satellite re7uires 1: Uoules to rotate half a revolution$ which ta-es 3: seconds. &hat is the ener*! re7uired for one da!'. Option A. 1,$,:: U. Option B. 1$%:: U. Option C. %4$4:: U. Correct Answer is. %4$4:: U. Eplanation. 1: Uoules  %revsmin  : mins  %, hours.

Question Number. ,6. he siSe of Centripetal
Question Number. /:.
Question Number. /1. An aircraft wei*hin* ,:: pounds lands at a speed of 1: ft=ec and stops in 1: =econds. &hat force was *enerated b! the bra-es 8assumin* *ravit! as 3% ftsec9. Option A. "%::: )bs. Option B. "%:: )bs. Option C. ",: )bs. Correct Answer is. "%:: )bs. Eplanation. N().

Question Number. /%.
Question Number. /3. One radian is e7ual to. Option A. the an*le subtended at the centre of a circle when the arc"len*th formed between two radial lines is e7ual in len*th to the radius. Option B. .5 de*rees. Option C. the an*le subtended at the centre of a circle when the arc"len*th formed between two radial lines is e7ual to T. Correct Answer is. the an*le subtended at the centre of a circle when the arc"len*th formed between two radial lines is e7ual in len*th to the radius. Eplanation. N().

Question Number. /,. A wei*ht on a sprin* almost touches the floor 5 times over %1 seconds. &hat is its fre7uenc!'. Option A. 3 c!clessecond. Option B. 13 c!clessecond. Option C. 5 c!clessecond. Correct Answer is. 13 c!clessecond. Eplanation.
Question Number. //. &hich of the followin* statements describes centrifu*al force'. Option A. E7ual to centripetal force and acts in the opposite direction. Option B. Freater than centripetal force and acts in the opposite direction. Option C. =maller than centripetal force and acts in the opposite direction. Correct Answer is. Freater than centripetal force and acts in the opposite direction. Eplanation. Centrifu*al is awa! from centre and e7ual 8but opposite9 to centripetal force.

Question Number. /. A bod! startin* from rest accelerates at the rate of %: metres per second

s7uared. &hat is the distance covered until the bod! reaches a velocit! of /: metres per second'. Option A. :.%/ -ilometres. Option B. /: metres. Option C. %./ metres. Correct Answer is. %./ metres. Eplanation. N().

Question Number. /5. he oscillation produced b! a pendulum %/::mm lon* has a periodic time of. Option A. 3:: milliseconds. Option B. 3 seconds. Option C. 1.%/ seconds. Correct Answer is. 3 seconds. Eplanation.  # %TV)* # V%./1: #   V:.%/ #   :./ # 3.

Question Number. /4. A drive shaft has a speed 1/:T radians a second. &hat is the speed in KM'. Option A. ,/::. Option B. 6:::. Option C. 1/::. Correct Answer is. ,/::. Eplanation. 1/:T  :%T # ,/:: %.3a. Mechanics G !namics. Question Number. 1. As an ob?ect slides down a slope$ its. Option A. -inetic ener*! increases and its potential ener*! increases. Option B. -inetic ener*! increases and its potential ener*! decreases. Option C. -inetic ener*! decreases and its potential ener*! increases. Correct Answer is. -inetic ener*! increases and its potential ener*! decreases. Eplanation. otential ener*! is converted into -inetic ener*!. Question Number. %. A sin*le fied pulle! 8discountin* friction etc9 has a mechanical advanta*e of. Option A. %. Option B. 1%. Option C. 1.

Correct Answer is. 1. Eplanation. N(). Question Number. 3. &hat is the ratio of load to effort called'. Option A. Mechanical advanta*e. Option B. elocit! ratio. Option C. Mechanical ratio. Correct Answer is. Mechanical advanta*e. Eplanation. N(). Question Number. ,. 1 -& is. Option A. 3,13 B per hour. Option B. 1./ +. Option C. 3: Uoules. Correct Answer is. 3,13 B per hour. Eplanation. 1 B # :.%63 &. 1 & # 1:.%63 B # 3.,13 B. 1 -& # 3,13 B. Question Number. /. he tension in the cable of a crane is %/:: N and it lifts a load throu*h /:m$ what is the wor- done on the load'. Option A. 1.%/  1: U/. Option B. /:: U. Option C. 1%./ -U. Correct Answer is. 1.%/  1: U/. Eplanation. N(). Question Number. . &hat is the -inetic ener*! of an aircraft of mass of % metric tonnes and has a velocit! of %ms'. Option A. 4 -U. Option B. , -U. Option C. % -U. Correct Answer is. , -U. Eplanation. Iinetic ener*! # 1%m. Onl! the  is s7uared. % metric tonnes # %::: -*. Question Number. 5. he wor- done in liftin* a mass of %::: -* verticall! to a hei*ht of ,: metres is. Option A. 4: -U. Option B. 54,.4 -U. Option C. /:: -U. Correct Answer is. 54,.4 -U. Eplanation. &or- done #
Option C. %. Correct Answer is. :./. Eplanation. 1: times the force out and onl! 1%:th speed$ it must have an efficienc! of a 1%. 81:: efficient it would have 1: times the force and 11:th the speed " strai*ht trade of force for speed9. Question Number. 6. 1 &att #. Option A. 1-*h. Option B. 1 Uoules. Option C. 1 +. Correct Answer is. 1 Uoules. Eplanation. 1 &att # 1 Uoulesecond. Question Number. 1:. +ow would !ou wor- out the wor- done b! a machine assumin* it is 1:: efficient'. Option A. (nput and output. Option B. Mechanical advanta*e and output. Option C. Mechanical advanta*e and input. Correct Answer is. Mechanical advanta*e and input. Eplanation. Assumin* the ;input; means input force$ to calculate the wor- done !ou will need the input force and the mechanical advanta*e of the machine to calculate the output force and distance 8&or- done # force  distance of output9. Question Number. 11. (*norin* friction$ if !ou let an ob?ect slide down a slope$ at the bottom. Option A. the potential ener*! is e7ual to the -inetic ener*!. Option B. the potential ener*! is more than the -inetic ener*!. Option C. the -inetic ener*! is more than the potential ener*!. Correct Answer is. the -inetic ener*! is more than the potential ener*!. Eplanation. All potential ener*! is converted to -inetic ener*!. Question Number. 1%. 1 + # 33::: ft.lbsmin or /:: ft.lbss or. Option A. 53 &atts. Option B. 5, &atts. Option C. 13: &atts. Correct Answer is. 5, &atts. Eplanation. 1 + # 5, &atts. Question Number. 13. A force of 1/N is needed to move a bod! of mass 3:-* alon* a footpath with uniform velocit!.
produced'. Option A. 1:.1-U. Option B. /43.%-U. Option C. 1,/4U. Correct Answer is. 1,/4U. Eplanation. N(). Question Number. 1/. he =( unit of ower is the. Option A. olt. Option B. ascal. Option C. &att. Correct Answer is. &att. Eplanation. N(). Question Number. 1. &hat is 1 ?oule in calories'. Option A. ,.14. Option B. %/%. Option C. :.%36. Correct Answer is. :.%36. Eplanation. N(). Question Number. 15. (f !ou push an ob?ect with a force of / N for 1: m in , seconds$ how much power is used'. Option A. 1%./ watts. Option B. 4 watts. Option C. %:: &atts. Correct Answer is. 1%./ watts. Eplanation. N(). Question Number. 14. &hat is the Iinetic Ener*! of a % -* ob?ect movin* at a velocit! of 1% ms'. Option A. %, Uoules. Option B. %44 Uoules. Option C. 1,, Uoules. Correct Answer is. 1,, Uoules. Eplanation. N(). Question Number. 16. A mass of 3-* wei*hs approimatel!. Option A. :.5/ N. Option B. . )B. Option C. 1.3 )B. Correct Answer is. . )B. Eplanation. 1 -* # %.% lb. =o 3 -* # 3  %.% # . lb. Question Number. %:. ower is the rate of doin* wor-. (t is measured in. Option A. &atts=econds.

Option B. Uoules=econds. Option C. Uoules  =econds. Correct Answer is. Uoules=econds. Eplanation. N(). Question Number. %1. A ::: -* en*ine is lifted off a win* to a hei*ht :./ metres and then pushed across the han*ar %, meters. he force re7uired to push the trolle! is 1% -N. &hat is the wor- done to move the trolle!'. Option A. %64-U. Option B. 4,MU. Option C. %44-U. Correct Answer is. %44-U. Eplanation. N(). Question Number. %%. A ball is dropped from rest. &hat is its speed after , seconds' 8a-e * as 1:mss9. Option A. 4:ms. Option B. ,:ms. Option C. %:ms. Correct Answer is. ,:ms. Eplanation. N(). Question Number. %3. 1 I& is e7ual to. Option A. 1.3, +. Option B. 1::: Uoules. Option C. %/% B. Correct Answer is. 1.3, +. Eplanation. N(). Question Number. %,. en -ilo*rams is epressed numericall! as. Option A. 1 M*. Option B. 1: I. Option C. 1: -*. Correct Answer is. 1: -*. Eplanation. 1: -ilo*rams # 1: -*. Question Number. %/. An ob?ect acceleratin* down a slope would *ain -inetic ener*!. Option A. less than the potential ener*! lost. Option B. *reater than the potential ener*! lost. Option C. e7ual to the potential ener*! lost. Correct Answer is. e7ual to the potential ener*! lost. Eplanation. N().

Module 2 Page 6 Question Number. %. A bloc- slides down a slope. Assumin* there is no friction. Option A. -inetic ener*! is *ained at the same rate as potential ener*! is lost.

Option B. -inetic ener*! is *ained at a *reater rate than potential ener*! is lost. Option C. potential ener*! is *ained at a *reater rate than -inetic ener*! is lost. Correct Answer is. -inetic ener*! is *ained at the same rate as potential ener*! is lost. Eplanation. IE *ained # E lost 8at the same rate9. Question Number. %5. he En*lish unit of mass is. Option A. the Newton. Option B. the -ilo*ram. Option C. the slu*. Correct Answer is. the slu*. Eplanation. he British unit of mass is the =lu*. Question Number. %4. he =( unit of ener*! is the. Option A. &att 8&9. Option B. ascal 8a9. Option C. Uoule 8U9. Correct Answer is. Uoule 8U9. Eplanation. N(). Question Number. %6. A ,./ -& electric motor is 6: efficient. +ow much ener*! does it use in %: seconds'. Option A. 6: -U. Option B. %.%/ -U. Option C. 1:: -U. Correct Answer is. 1:: -U. Eplanation. N(). Question Number. 3:. A pile driver of mass 1::: -*$ hits a post 3 m below it. (t moves the post 1: mm. Assumin* *ravit! # 1: ms$ what is the -inetic ener*! of the pile driver'. Option A. 3: -U. Option B. ,/ -U. Option C. 6: -U. Correct Answer is. 3: -U. Eplanation. N(). Question Number. 31. he =( unit for wor- is the. Option A. Uoule. Option B. &att. Option C. horsepower. Correct Answer is. Uoule. Eplanation. N(). Question Number. 3%. &hat wor- is done if a force of 1:: N moves a bod! 1/ metres'. Option A. 1/:: -U. Option B. 1./ -U. Option C. :.1/ mU.

Correct Answer is. 1./ -U. Eplanation. &or- # force  distance 1::N  1/m # 1/::U$ or 1./-U. Question Number. 33. ower is the rate of doin* wor-. (t is measured in. Option A. Uoules  =econds. Option B. Uoules=econds. Option C. &atts=econds. Correct Answer is. Uoules=econds. Eplanation. ower # ener*! per second # Uoulessecond. Question Number. 3,. A bloc- slides down a slope. Assumin* there is no friction. Option A. potential ener*! is *ained at a *reater rate than -inetic ener*! is lost. Option B. -inetic ener*! is *ained at the same rate as potential ener*! is lost. Option C. -inetic ener*! is *ained at a *reater rate than potential ener*! is lost. Correct Answer is. -inetic ener*! is *ained at the same rate as potential ener*! is lost. Eplanation. IE *ained # E lost 8at the same rate9. %.3b. Mechanics G !namics. Question Number. 1. A *ood refri*erant has a. Option A. low condensation temperature and hi*h condensation pressure. Option B. low condensation temperature and low condensation pressure. Option C. hi*h condensation temperature and low condensation pressure. Correct Answer is. hi*h condensation temperature and low condensation pressure. Eplanation. N(). Question Number. %. &hat is the momentum of a ball of mass % *rams and has a velocit! of 1:cms'. Option A. / -*.ms. Option B. %: -*.ms. Option C. :.:::% -*.ms. Correct Answer is. :.:::% -*.ms. Eplanation. Momentum # mass  velocit!. But first convert the numbers to =(. 8% *rammes # %1::: -*. 1:cm # 1:1::: Metres9. Question Number. 3. A *!roscope suffers from apparent wander. his is due to. Option A. friction on the *imbals and bearin*s. Option B. the earth;s rotation. Option C. the aircraft fl!in* alon* a northsouth trac-. Correct Answer is. the earth;s rotation. Eplanation. Keal wander is ph!sical movement from friction in bearin*s. Apparent wander is due to effect of earth;s rotation. Question Number. ,. he =( unit of momentum is the. Option A. metre s7uared 8m %9. Option B. -ilo*ram metre per second.

Option C. -ilo*ram  metre 8-*m9. Correct Answer is. -ilo*ram metre per second. Eplanation. Momentum # mass  velocit!. =o units are -* ms. Question Number. /. recession in a *!ro is. Option A. proportional to the ma*nitude of the tor7ue applied. Option B. proportional to the s7uare of the ma*nitude of the tor7ue applied. Option C. inversel! proportional to the ma*nitude of the tor7ues applied. Correct Answer is. proportional to the ma*nitude of the tor7ue applied. Eplanation. N(). Question Number. . A *!ro with a fied point free to rotate in three ais is. Option A. a tied *!ro. Option B. a space *!ro. Option C. an earth *!ro. Correct Answer is. a tied *!ro. Eplanation. (f the *!ro is fied to one point$ it is a tied *!ro. 8An earth *!ro is ;tied; specificall! to an earth reference point9. Question Number. 5. &hat t!pe of friction re7uires the *reatest force to overcome it'. Option A. !namic friction. Option B. =tatic friction. Option C. Kollin* friction. Correct Answer is. =tatic friction. Eplanation. =tatic friction 8sometimes called ;stiction;9 is the *reatest friction.
Option B. inversel! proportional to the tor7ue. Option C. proportional to the s7uare of the tor7ue. Correct Answer is. proportional to the tor7ue. Eplanation. N(). Question Number. 11. he *!roscopic principle is based upon. Option A. NewtonPs 3rd )aw. Option B. NewtonPs %nd )aw. Option C. NewtonPs 1st )aw. Correct Answer is. NewtonPs 1st )aw. Eplanation. Newton;s
Option A. -ilo*ram per cubic metre 8-*m39. Option B. ascal 8a9. Option C. cubic metre 8m39. Correct Answer is. -ilo*ram per cubic metre 8-*m39. Eplanation. N(). Question Number. 3. Kelative densit! is. Option A. densit! of water  densit! of medium. Option B. densit! of waterdensit! of medium. Option C. densit! of mediumdensit! of water. Correct Answer is. densit! of mediumdensit! of water. Eplanation. N(). Question Number. ,. he standard for measurin* densit! is. Option A. : JC and 5: mm of mercur!. Option B. "%: JC and 5:: mm of mercur!. Option C. @%: JC and 5: mm of mercur!. Correct Answer is. : JC and 5: mm of mercur!. Eplanation. =. Question Number. /. 1-* of water is heated from : JC to % JC. (ts volume will. Option A. decrease. Option B. sta! the same. Option C. increase. Correct Answer is. decrease. Eplanation. &hen ice melts$ its volume decreases up to 3 JC. Question Number. . A pilot re7uests 6.% tonnes of fuel. he bowser driver reports to the pilot that the specific *ravit! is :.4$ what will the uplift be'. Option A. 53: litres. Option B. 11/:: litres. Option C. 6%:: litres. Correct Answer is. 11/:: litres. Eplanation. 1 litre of water has a mass of 1-*. 1::: litres of water has a mass of 1 metric tonne. 6.% tonnes of water is 6%:: litres. But fuel is li*hter than water 8:.49 so the uplift will be more than 6%:: litres. Question Number. 5. =pecific *ravit!. Option A. is measured in -*m %. Option B. is measured in -*m 3. Option C. has no units. Correct Answer is. has no units. Eplanation. =pecific *ravit! is the densit! of the fluid divided b! the densit! of water. =ince both have the same units 8-*m 39 the! cancel " hence$ no units.

Question Number. 4. he standard temperature and pressure for measurin* the densit! of li7uids is. Option A. 1/ JC and 5: mm+*. Option B. : JC and 5: mm+*. Option C. , JC and 5: mm+*. Correct Answer is. , JC and 5: mm+*. Eplanation. =ince water is most dense at , JC 81::: -*m 39$ this is used as the standard temperature. &hen wor-in* out specific *ravit!$ the fluid in 7uestion must also be , JC. 8But remember it is : JC for *ases$ and room temp " %: JC " for barometers9. Question Number. 6. he standard temperature and pressure for measurin* the volume of li7uids and solids is. Option A. %: JC and 5:: mm+*. Option B. %: JC and 5: mm+*. Option C. : JC and 5: mm+*. Correct Answer is. %: JC and 5: mm+*. Eplanation. =ince the volume of solids and *ases chan*es with temperature 8and a lesser amount with pressure9 the standard for measurin* volume is %: JC. 8room temp.9 and 5:mm+* 8standard sea level atmospheric pressure9. Question Number. 1:. Fiven that 1 cubic foot of water wei*hs %., lbs and the specific *ravit! of fuel is :.41$ what is the wei*ht of 1: cubic foot of fuel'. Option A. ,:%.4 lbs. Option B. /:/., lbs. Option C. 55:.3 lbs. Correct Answer is. /:/., lbs. Eplanation. 1:  %., # %,. %,  :41 #. Question Number. 11. At what temperature does water have the *reatest densit!'. Option A. : JC. Option B. 1:: JC. Option C. , JC. Correct Answer is. , JC. Eplanation. =olidification be*ins at , JC when coolin*. Question Number. 1%. he specific *ravit! of meth!lated spirit is :.4. (ts densit! is. Option A. 4:: *m 3. Option B. 4:: -*m 3. Option C. 4: -*m 3. Correct Answer is. 4:: -*m 3. Eplanation. s* # densit! of fluiddensit! of water densit! of fluid # s*  densit! of water densit! of water # 1::: -*m 3. Question Number. 13. he densit! of Cu is 4$6::-*m 3. &hat is its relative densit!'. Option A. 46:. Option B. 4.6.

Option C. 46. Correct Answer is. 4.6. Eplanation. rel. densit! # densit! of substancedensit! of water# 46::1:::. %.,b. Mechanics " ero =(. Correct Answer is. 3: =(. Eplanation. Absolute pressure # *au*e pressure @ atmospheric pressure. 8he F in =(F means ;*au*e;9 Atmospheric pressure varies sli*htl! so is not alwa!s the 1,.5 =( of the (=A. http0en.wi-ipedia.or*wi-iound"force2per2s7uare2inch Question Number. /. &ater is most dense at. Option A. ", JC. Option B. : JC. Option C. @, JC. Correct Answer is. @, JC. Eplanation. As water cools$ the molecules be*in to cr!stallise at , JC. Cr!stalliSed water 8i.e. ice9 has a *reater volume than li7uid water and therefore less densit! 8that is wh! ice floats9. http0www.ph!sical*eo*raph!.netfundamentals4a.html Question Number. . iscosit! can be described as.

Option A. Newton;s 1st law of motion. Option B. fluids flowin* in a strai*ht line. Option C. the internal resistance for a fluid to flow. Correct Answer is. the internal resistance for a fluid to flow. Eplanation. iscosit! is opposition to flow of a fluid. Question Number. 5. +ow much lift is produced on a win* can be derived from. Option A. Bernoulli;s heorem. Option B.
Option B. 33 de*ree rise in
Correct Answer is. 1 lb of water b! 1 JC. Eplanation. 1 C+ is the heat re7uired to raise 1 lb of water 1 de*ree Centi*rade 8#1.4 B9. Question Number. 11. 1 B # 554 ft lbs which is the ener*! re7uired to raise the temperature of. Option A. 1 lb of water b! 1 J<. Option B. 1 -* of water b! 1 J<. Option C. 1 lb of water b! 1 JC. Correct Answer is. 1 lb of water b! 1 J<. Eplanation. 1 B is the heat re7uired to raise 1 lb of water 1 de*ree
Eplanation. e*rees C to Ielvin " ?ust add %53. Question Number. 15. ",: JC in
Question Number. %3. Celsius to
Option A. ,/: e*rees Celsius. Option B. ,:: e*rees Celsius. Option C. %3%.% de*rees Celsius. Correct Answer is. ,/: e*rees Celsius. Eplanation. C # /68< " 3%9. Question Number. 3:.
Option A. : JC and 5:mm of Mercur!. Option B. %: JC and 5::mm of Mercur!. Option C. %: JC and 5:mm of Mercur!. Correct Answer is. : JC and 5:mm of Mercur!. Eplanation. = also applies to solids and li7uids. Question Number. 3. (n ;standard conditions; what is the standard for measurement of volume and densit! of a li7uid or solid'. Option A. %: JC and 5:mm of Mercur!. Option B. : JC and 5:mm of Mercur!. Option C. %: JC and 5::mm of Mercur!. Correct Answer is. : JC and 5:mm of Mercur!. Eplanation. N(). Question Number. 35. 4,% e*rees
Option B. Ielvin scale. Option C.
compared to the specific heat capacit! of a *as heated at constant volume$ is. Option A. more. Option B. less. Option C. the same. Correct Answer is. more. Eplanation. Cp is sli*htl! hi*her than Cv. suall! it onl! applies to *ases.
Question Number. 1%. A *ood refri*erant has. Option A. hi*h condensin* pressure$ low evaporatin* temperature. Option B. hi*h condensin* pressure$ hi*h evaporatin* temperature. Option C. low condensin* pressure$ low vaporatin* temperature. Correct Answer is. low condensin* pressure$ low vaporatin* temperature. Eplanation. he refri*erant must evaporate at lower temperature than the ;cold space; and must condense at a relativel! hi*h temperature$ with a low compression level. Question Number. 13. (n a heat pump. Option A. (n a heat pump. Option B. the condenser loses heat. Option C. flow across the condenser is alwa!s in one direction. Correct Answer is. the condenser loses heat. Eplanation. +eat pumps can be used to cool as well as heat. Kefri*erant flow chan*es direction respectivel!$ but the condensor alwa!s re?ects the heat. Question Number. 1,. Charles; )aw states that. Option A. volume varies inversel! with temperature. Option B. volume varies directl! with temperature. Option C. volume e7uals pressure  temperature. Correct Answer is. volume varies directl! with temperature. Eplanation. N(). http0en.wi-ipedia.or*wi-iCharles2law Question Number. 1/. Bo!le;s law states that. Option A. pressure e7uals temperature divided b! volume. Option B. pressure varies directl! with volume. Option C. pressure varies inversel! with volume. Correct Answer is. pressure varies inversel! with volume. Eplanation. ressure rises$ volume decreases. Question Number. 1. Convection does not occur in. Option A. li7uids. Option B. li7uids. Option C. solids. Correct Answer is. solids. Eplanation. he medium must ;flow; for conduction to ta-e place. Question Number. 15. A process where volume does not chan*e is. Option A. isochoric. Option B. isobaric. Option C. isothermic. Correct Answer is. isochoric. Eplanation. N(). Question Number. 14. A process where heat is not transferred to or from a *as is. Option A. adiabatic.

Option B. isochoric. Option C. isobaric. Correct Answer is. adiabatic. Eplanation. N(). Question Number. 16. A process where pressure does not chan*e is -nown as. Option A. isochoric. Option B. isothermic. Option C. isobaric. Correct Answer is. isobaric. Eplanation. (so; means e7ual. ;bar; is pressure. Question Number. %:. &hen a li7uid is heated$ it epands. Option A. more than a solid. Option B. less than a solid. Option C. more than a *as. Correct Answer is. more than a solid. Eplanation. Fenerall! spea-in*$ li7uids have a *reater coefficient of thermal epansion than solids. Question Number. %1. (f pressure on a li7uid increases$ whilst temperature is held constant$ the volume will. Option A. decrease. Option B. remain constant. Option C. increase. Correct Answer is. remain constant. Eplanation. )i7uids are incompressible. Question Number. %%. A process where temperature remains the same is -nown as. Option A. isobaric. Option B. isochoric. Option C. isothermic. Correct Answer is. isothermic. Eplanation. (so; means e7ual. ;hermal; is temperature. Question Number. %3. &hat is descriptive of Bo!le;s )aw' 8#ressure$ #olume$ #emperature9. Option A.  is proportional to 1. Option B.  is proportional to 1. Option C.  is proportional to . Correct Answer is.  is proportional to 1. Eplanation. ressure 89 is inversel! proportional to volume 89. Question Number. %,. A compressor increases. Option A. -inetic ener*!. Option B. potential ener*!.

Option C. movin* ener*!. Correct Answer is. potential ener*!. Eplanation. Compressed air is a form of ;potential ener*!;. Question Number. %/. 1  1  1 # %  %  % is 8#ressure$ #olume$ #emperature9. Option A. (deal *as law. Option B. Charles; law. Option C. Bo!le;s law. Correct Answer is. (deal *as law. Eplanation. N(). Question Number. %. 1  1 # %  % at a constant pressure is 8#ressure$ #olume$ #emperature9. Option A. ideal *as law. Option B. Bo!le;s law. Option C. Charles; law. Correct Answer is. Charles; law. Eplanation. N(). Question Number. %5. 1  1 # %  % at a constant temperature is 8#ressure$ #olume$ #emperature9. Option A. Bo!le;s law. Option B. ideal *as law. Option C. Charles; law. Correct Answer is. Bo!le;s law. Eplanation. N(). Question Number. %4. he atmosphere;s temperature chan*es at a rate of "1.64 JC per 1::: ft up to 3$::: ft where it remains constant at. Option A. "/ J<. Option B. "/% JC. Option C. "/ JC. Correct Answer is. "/ JC. Eplanation. he troposphere is a constant "/ de*rees C. Question Number. %6. A process where heat is *iven off to its surroundin*s is called. Option A. isothermal. Option B. adiabatic. Option C. isobaric. Correct Answer is. isothermal. Eplanation. Adiabatic; is a process where NO heat is *iven off to its surroundin*s. (sobaric is constant pressure. (sothermal$ to -eep constant temperature must *ive off heat as it is compressed. Question Number. 3:. A bod! which is allowed to epand when heated$ epands past the

pressure imposed on it and. Option A. a force is produced. Option B. nothin* will happen. Option C. wor- is done. Correct Answer is. wor- is done. Eplanation. &or- is done when it eerts a force and moves 8wor- # force  distance9. es$ a force is produced but this is not the whole stor!. Question Number. 31. he 7uantit! of heat developed b! burnin* 1 -* of fuel is -nown as. Option A. radiant heat. Option B. latent heat. Option C. heat of combustion. Correct Answer is. heat of combustion. Eplanation. he ener*! content of fuel is -nown as ;heat of combustion;. Question Number. 3%. he transfer of heat throu*h radiation is achieved b! the application of radioactive isotopes. Option A. the application of radioactive isotopes. Option B. warmin* up the intervenin* medium. Option C. not warmin* up the intervenin* medium. Correct Answer is. warmin* up the intervenin* medium. Eplanation. N(). Question Number. 33. he dew point is. Option A. the point when air is cooled at which the moisture ?ust starts to condense. Option B. the point at which air can be heated. Option C. the point when air is cooled at which the moisture does not condense. Correct Answer is. the point when air is cooled at which the moisture ?ust starts to condense. Eplanation. Chec- the definition of dew point. Question Number. 3,. &hat are common refri*erant a*ents'. Option A. formaldeh!de$ ammonia$ carbon dioide. Option B. water$ freon$ ammonia. Option C. r! ice$ meth!l bromide$ water. Correct Answer is. water$ freon$ ammonia. Eplanation. &ater is used in coolin* towers 8and when !ou sweat9.
Option A. adiabatic. Option B. isochoric. Option C. isothermal. Correct Answer is. isothermal. Eplanation. All heat *iven awa! -eeps the process at constant temperature " thus ;isothermal;. Question Number. 35. A material capable of *oin* direct from solid to *as is a. Option A. substrate. Option B. substance. Option C. sublimate. Correct Answer is. sublimate. Eplanation. A sublimate can *o directl! from solid to *as. Question Number. 34. he composition of the atmosphere is approimatel!. Option A. 1/ o!*en and ,/ nitro*en. Option B. ,/ o!*en and 1/ nitro*en. Option C. %/ o!*en and 3/ nitro*en. Correct Answer is. 1/ o!*en and ,/ nitro*en. Eplanation. Air is 54 8appro. ,/9 nitro*en and %1 8appro 1/9 o!*en. Question Number. 36. &hat is meant b! adiabatic'. Option A. All heat crosses the boundar!. Option B. No heat crosses the boundar!. Option C. =ome heat crosses the boundar!. Correct Answer is. No heat crosses the boundar!. Eplanation. No heat is lost or *ained in an adiabatic process. Question Number. ,:. (f a *as is heated and its temperature is raised b! 1I. &hat happens to its volume'. Option A. ecreases b! 1%53. Option B. (ncreases b! 1%53. Option C. Kemains the same. Correct Answer is. (ncreases b! 1%53. Eplanation. Charles;s )aw. Also how the absolute Sero 8"%53 JC is calculated9. Question Number. ,1. (f a bloc- of ice melts in a *lass of water$ the level of water in the *lass will. Option A. fall. Option B. rise. Option C. remain the same. Correct Answer is. remain the same. Eplanation. N(). Question Number. ,%. (f heat is constant$ and if pressure increases on a li7uid what will the volume do'.

Option A. (ncrease. Option B. Kemains constant. Option C. ecrease. Correct Answer is. Kemains constant. Eplanation. )i7uids are considered incompressible$ therefore their volume remains constant. Question Number. ,3. Kadiant heat of a bod!$ heated from a radiant source is. Option A. inversel! proportional to the s7uare of the distance. Option B. proportional to distance. Option C. inversel! proportional. Correct Answer is. inversel! proportional to the s7uare of the distance. Eplanation. he wordin* of this 7uestion is terrible$ but it is probabl! referrin* to radiant heat bein* inversel! proportional to the s7uare of the distance from the source of the. Question Number. ,,. Combined *as law relates volume$ pressure and. Option A. temperature. Option B. densit!. Option C. velocit!. Correct Answer is. temperature. Eplanation. 111 # %%% Combined 8or ideal9 *as law. Question Number. ,/. he heat *iven off b! burnin* a 1-* bloc- of wood is. Option A. transmissive heat. Option B. radiant heat. Option C. latent heat. Correct Answer is. radiant heat. Eplanation. he embers of burnin* wood produce radiant heat. Question Number. ,. + %: in what form holds most ener*!'. Option A. =team. Option B. (ce. Option C. &ater. Correct Answer is. =team. Eplanation. &ater in the form of steam has the most ener*!. Question Number. ,5. A bloc- of metal is melted. (t will. Option A. remain the same volume. Option B. decrease in volume. Option C. increase in volume. Correct Answer is. increase in volume. Eplanation. N(). Question Number. ,4. he ener*! that ice at : JC must *ain so that it turns to water at : JC is called. Option A. the latent heat of vaporisation. Option B. sensible ener*!.

Option C. the latent heat of fusion. Correct Answer is. the latent heat of fusion. Eplanation.
Option B. Both 1 -* of ice at : JC and 1 -* of water at : JC have the same wei*ht. Option C. 1 -* of water at : JC. Correct Answer is. Both 1 -* of ice at : JC and 1 -* of water at : JC have the same wei*ht. Eplanation. N(). Question Number. //. &hich has the *reatest densit!'. Option A. 1 -* of ice at : JC. Option B. 1 -* of water at : JC. Option C. Both 1 -* of ice at : JC and 1 -* of ice at : JC have the same densit!. Correct Answer is. Both 1 -* of ice at : JC and 1 -* of ice at : JC have the same densit!. Eplanation. N(). Question Number. /. &hich has the *reatest volume'. Option A. 1 -* of water at : JC. Option B. 1 -* of ice at : JC. Option C. Both 1 -* of ice at : JC and 1 -* of ice at : JC have the same volume. Correct Answer is. Both 1 -* of ice at : JC and 1 -* of ice at : JC have the same volume. Eplanation. N(). Question Number. /5. he temperature at which water will eist as a solid$ li7uid and *as$ all at the same time$ is called. Option A. the triple point and is approimatel! : JC. Option B. the tri"state point and is approimatel! at : JC. Option C. the tri"state point and is approimatel! 64 JC. Correct Answer is. the triple point and is approimatel! : JC. Eplanation. N(). Question Number. /4. Material A and material B are both removed from the same oven at the same time$ after bein* in the same amount of time. Material A is a hi*her temperature than material B. his is because. Option A. material B has a hi*her specific heat capacit!. Option B. material A must have had a hi*her temperature before it was put in the oven. Option C. material A has a hi*her specific heat capacit!. Correct Answer is. material A has a hi*her specific heat capacit!. Eplanation. N(). ,. Optics 8)i*ht9. Question Number. 1. &hat is the thic-ness of a sin*le mode fibre optic'. Option A. %:: micrometres. Option B. / micrometres. Option C. /: micrometres. Correct Answer is. / micrometres. Eplanation. (ntroduction to
Option A. a real ima*e. Option B. a virtual ima*e. Option C. chromatic aberrations. Correct Answer is. a virtual ima*e. Eplanation. N(). Question Number. 3. (n fibreoptics the t!pe of cable is chosen b!. Option A. matchin* the diameter of the cable to the wavelen*th. Option B. distance re7uired to travel. Option C. the stren*th of si*nal needed. Correct Answer is. distance re7uired to travel. Eplanation. (ntroduction to
Question Number. 4. Attenuation in fibre optic cables is most often caused b!. Option A. bac-scatterin* and microbends. Option B. microbends and scatterin*. Option C. absorption and scatterin*. Correct Answer is. absorption and scatterin*. Eplanation. Althou*h all three 8microbends$ scatterin* and absorbtion9 cause attenuation in fibre optics$ microbends are the most eas! to manufacture out of the cable. (ntroduction to
Question Number. 1,. he fibre optic receiver is a. Option A. laser diode. Option B. photodiode. Option C. li*ht emittin* diode. Correct Answer is. photodiode. Eplanation. (ntroduction to
Question Number. %:. A mirror. Option A. refracts all li*ht. Option B. reflects all li*ht. Option C. absorbs a percenta*e of li*ht. Correct Answer is. absorbs a percenta*e of li*ht. Eplanation. N(). Question Number. %1. he width of a multimode fibre optic cable 8includin* the claddin*9 is. Option A. 1 Ym. Option B. 1:: Ym. Option C. 1: Ym. Correct Answer is. 1:: Ym. Eplanation. his must be referrin* to the ;overall; diameter " i.e that of the claddin*$ since the core is /: or %./ micrometers 8microns9. (ntroduction to
Question Number. %. &hat is the speed of li*ht in air at : JC. Option A. 331 ms. Option B. 3:: mYs. Option C. 331 mms. Correct Answer is. 3:: mYs. Eplanation. =tandard fi*ure is 3::$:::$::: ms. Convert that to mmicrosecond and !ou must divide b! 1$:::$:::. (ntroduction to
Correct Answer is. diameter is *reater than the wavelen*th. Eplanation. Multimode fibres are bi**er than sin*le mode fibres. (ntroduction to
Question Number. 35. &hen a beam of li*ht passes from one medium to another with a different refractive inde$ what will happen to the beam of li*ht'. Option A. otal internal reflection. Option B. Chan*e speed. Option C. otal internal refraction. Correct Answer is. Chan*e speed. Eplanation. A beam of li*ht passes from one medium to another " its speed will chan*e. his is the onl! statement of certaint!$ since no information is *iven about the an*le of incidence. Question Number. 34. A fibre optic cable has different refractive indees across its core diameter$ it is a. Option A. sin*le mode fibre. Option B. *raded inde fibre. Option C. step inde fibre. Correct Answer is. *raded inde fibre. Eplanation. A fibre optic with a different refractive inde across its core diameter is a ;*raded inde;. (ntroduction to
Option B. laser diode. Option C. li*ht emittin* diode. Correct Answer is. photodiode. Eplanation. he fibre optic receiver is a photo diode. (ntroduction to
Question Number. ,4. (n a concave mirror$ li*ht ra!s parallel to mirror ais will be reflected. Option A. throu*h the focal point. Option B. bac- to the centre of curvature. Option C. parallel to mirror ais. Correct Answer is. throu*h the focal point. Eplanation. All the li*ht ra!s focus at the focal point. Question Number. ,6. (n a concave mirror$ a li*ht ra! passin* throu*h the focal point will be reflected. Option A. throu*h the focal point. Option B. on the centre line of the mirror. Option C. parallel to the ais. Correct Answer is. parallel to the ais. Eplanation. All ra!s which pass throu*h the focal point$ reflect from the mirror then travel parallel to the ais. Question Number. /:. A passive sensor. Option A. does not re7uire power. Option B. re7uires power for the sensor. Option C. re7uires power for the transmitter. Correct Answer is. does not re7uire power. Eplanation. assive sensors do not re7uire power. (ntroduction to
Optics b! Uohn Crisp. Question Number. /,. (n spherical aberrations. Option A. incident ra!s further from the ais intersect sli*htl! closer to the lens to produce a distorted picture. Option B. incident ra!s further from the ais intersect sli*htl! further awa! from the lens to produce a distorted picture. Option C. the bendin* of li*ht throu*h lens intersect at the same point 8achromatic lens9. Correct Answer is. incident ra!s further from the ais intersect sli*htl! closer to the lens to produce a distorted picture. Eplanation. N(). Question Number. //. (n a fibre optic fl!in* control s!stem. Option A. the sensor and transmitter re7uire electrical power. Option B. the sensor inputs to the transmitter which needs electrical power. Option C. the sensor needs electrical power. Correct Answer is. the sensor and transmitter re7uire electrical power. Eplanation. he sensor is a photodiode or a (N diode 8needs power9 and the transmitter is an )E or laser 8needs power9. (ntroduction to
Option A. inverted$ lar*er and virtual. Option B. inverted$ smaller and real. Option C. erect$ smaller and real. Correct Answer is. inverted$ smaller and real. Eplanation. N(). Question Number. :. A parabolic mirror ma! be used to prevent. Option A. lateral inversion. Option B. spherical aberration. Option C. formation of a penumbra. Correct Answer is. spherical aberration. Eplanation. N(). Question Number. 1. he refractive inde for air is approimatel!. Option A. 1. Option B. 1:. Option C. :. Correct Answer is. 1. Eplanation. (ntroduction to
Question Number. /. he power of a lens is measured in. Option A. )umens per &att. Option B. &atts. Option C. iopters. Correct Answer is. iopters. Eplanation. N(). Question Number. .
Option B. / times the thic-ness of the lens. Option C. 1 inch. Correct Answer is. focal len*th. Eplanation. N(). Question Number. 5%. A 222222 lens is thic-er in the middle than at the ed*es. (t is. Option A. conver*in*. Option B. concave. Option C. upsharp. Correct Answer is. conver*in*. Eplanation. N(). http0www.ph!s.hawaii.edu[teboptics?avaclens Question Number. 53. &hen is the onl! time a concave mirror forms a virtual ima*e'. Option A. &hen the ob?ect is at the focal point. Option B. &hen the ob?ect is inside the focal point. Option C. &hen the ob?ect is placed at the centre of curvature. Correct Answer is. &hen the ob?ect is inside the focal point. Eplanation. N(). http0www.*lenbroo-.-1%.il.us*bssciph!sclassreflnu13l3e.html Question Number. 5,. A conve mirror forms a virtual ima*e when. Option A. the ob?ect is at the centre of curvature. Option B. the ob?ect is inside the focus. Option C. alwa!s. Correct Answer is. alwa!s. Eplanation. N(). Question Number. 5/. A Concave mirror is used in. Option A. a rear view mirror. Option B. a periscope. Option C. headli*hts. Correct Answer is. headli*hts. Eplanation. N(). /. &ave Motion and =ound. Question Number. 1. &hen the movement of an ob?ect rotatin* around a radius at a constant speed is pro?ected onto a plane$ the pro?ected ima*e follows what path'. Option A. =inusoidal. Option B. )ateral. Option C. )on*itudinal. Correct Answer is. =inusoidal. Eplanation. N(). Question Number. %. he speed of sound in air at : JC is approimatel!. Option A. 331 ms. Option B. 3  1:4 ms.

Option C. 141 ms. Correct Answer is. 331 ms. Eplanation. N(). Question Number. 3. (f a wave travelin* to a point meets a wave travelin* from that point$ of e7ual fre7uenc!. Option A. the two waves cancel each other out. Option B. the! will have no effect on each other. Option C. a standin* wave is formed. Correct Answer is. a standin* wave is formed. Eplanation. N(). Question Number. ,. Qualit! of sound depends upon. Option A. pure sound waves bein* produced b! the source. Option B. fre7uenc! and harmonics of the waves bein* produced. Option C. 7ualit! of the receiver. Correct Answer is. fre7uenc! and harmonics of the waves bein* produced. Eplanation. N(). Question Number. /. articles vibratin* in air. Option A. tend to *ive off heat. Option B. tend to *ive off li*ht. Option C. produce waves. Correct Answer is. produce waves. Eplanation. articles vibratin* in air produce sound. Question Number. . he fundamental fre7uenc! is the. Option A. 3rd harmonic. Option B. 1st harmonic. Option C. %nd harmonic. Correct Answer is. 1st harmonic. Eplanation. N(). Question Number. 5. he first overtone of a sound wave is the. Option A. 1st harmonic. Option B. fundamental fre7uenc!. Option C. %nd harmonic. Correct Answer is. %nd harmonic. Eplanation. N(). Question Number. 4. wo pure tones of similar fre7uenc! are heard b! a person. &hat will the! hear'. Option A. One pure tone. Option B. A beat of the two tones. Option C. wo tones. Correct Answer is. A beat of the two tones.

Eplanation. At certain points$ the trou*hs cancel the pea-s. At other points the pea-s ;add to; other pea-s. he net effect is a low fre7uenc! oscillation in amplitude.W. Question Number. 6. wo sound waves of the same fre7uenc! and amplitude are movin* half a wavelen*th out of phase with each other. &hat will be heard'. Option A. Nothin*. Option B. wice the volume of one of the sound waves. Option C. +alf the volume of one of the sound waves. Correct Answer is. Nothin*. Eplanation. he pea-s will cancel the trou*hs. Question Number. 1:. A fire en*ine is approachin* !ou with its siren on. As it passes !ou its pitch. Option A. sta! the same. Option B. increases. Option C. decreases. Correct Answer is. decreases. Eplanation. N(). Question Number. 11. Qualit! of sound is dependant on. Option A. number and pitch of harmonics. Option B. medium it is travelin* throu*h. Option C. fre7uenc! of the suppl!. Correct Answer is. number and pitch of harmonics. Eplanation. Qualit! of sound is dependant upon the number of harmonics and the pitch. Question Number. 1%. &hat fre7uenc! is a tone which is , times the fundamental fre7uenc!'. Option A. %nd overtone. Option B. 3rd overtone. Option C. 3rd harmonic. Correct Answer is. 3rd overtone. Eplanation. he ,th harmonic is also called the 3rd overtone. Question Number. 13. (ntensit! of sound waves. Option A. is not affected b! distance. Option B. varies inversel! as the s7uare of distance from source. Option C. var! directl! as per distance from source. Correct Answer is. varies inversel! as the s7uare of distance from source. Eplanation. =ound diminishes with the s7uare of the distance from the source 8i.e double the distance # 1, the dB$ triple the distance # 16 the dB etc.9 " echnicall! called a lo*"linear scale. Question Number. 1,. (n a standin* wave the point where continuous vibration of maimum amplitude occurs is called the. Option A. harmonic. Option B. anti"node.

Option C. node. Correct Answer is. anti"node. Eplanation. he pea-s are the anti"nodes. =ee Eternal website. Question Number. 1/. he name *iven to sounds below that which the human ear can detect$ i.e. below %:+S is. Option A. ultra sound. Option B. infra sound. Option C. sonic pitch. Correct Answer is. infra sound. Eplanation. =ee how silent thunder can shatter windows at Eternal website. Question Number. 1. he speed of sound in dr! air is 331 ms. (n a solid the speed would. Option A. increase. Option B. decrease. Option C. sta! the same. Correct Answer is. increase. Eplanation. =peed of sound is *reater in a solid than in air. Question Number. 15. (f a tunin* for- is struc- and held close to the ear and slowl! rotated about the vertical ais$ in one rotation how man! times is there no sound'. Option A. %. Option B. =ound is audible for the whole revolution. Option C. ,. Correct Answer is. %. Eplanation. wo sound waves interfere creatin* a relativel! ;dead; Sone for approimatel! % 7uarters of the rotation. Question Number. 14. &hat is the phenomenon that occurs when a siren that approaches !ou$ at the point of passin*$ the pitch decreases'. Option A. Kesonance. Option B. oppler effect. Option C. Echo. Correct Answer is. oppler effect. Eplanation. oppler effect. Question Number. 16.