Engineering Knowledge Test Previous Year Question Papers By
SSBCrack.com & SSCrackExams.com
THE FOLLOWING QUESTIONS ARE A MIX OF
EKT QUESTIONS OF PREVIOUS YEARS (UPTO 25 OCT 2009) + FTS (EKT) EXAMINATIONS (UPTO 7 NOV 2009) + MODEL QUESTIONS AT THE SITE www.ssbcrack.com
DISCLAIMER: The answers may not be correct try to search on the Internet to get more accurate answers. Also few questions are unsolved; if you know the answers share it with others.
All the questions are memory based and may differ from actual questions but if you prepare them you will clear your EKT for sure as mentioned by the followers. All the best
===================================================================================== ========================= SECTION-1 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ===================================================================================== ========================= 1. Sampling is helpful for-----------------------------------------------------------------------------for------------------------------------------------------------------------------------------------------quantisization
THE FOLLOWING QUESTIONS ARE A MIX OF
EKT QUESTIONS OF PREVIOUS YEARS (UPTO 25 OCT 2009) + FTS (EKT) EXAMINATIONS (UPTO 7 NOV 2009) + MODEL QUESTIONS AT THE SITE www.ssbcrack.com
DISCLAIMER: The answers may not be correct try to search on the Internet to get more accurate answers. Also few questions are unsolved; if you know the answers share it with others.
All the questions are memory based and may differ from actual questions but if you prepare them you will clear your EKT for sure as mentioned by the followers. All the best
===================================================================================== ========================= SECTION-1 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ===================================================================================== ========================= 1. Sampling is helpful for-----------------------------------------------------------------------------for------------------------------------------------------------------------------------------------------quantisization
2. Sound waves are (It came in both papers)--------------------------------------------------------papers)---------------------------------------------------------------------------------longitudinal a .Longitudinal .Longitudinal
b. Transverse
c. Electro magnetic
d. Gravitational
3. If two identical capacitors connected parallel then effective capacitance..?---------------------------------capacitance..?---------------------------------C=C1+C2
4. Wein bridge is used to measure--------------------------------------measure------------------------------------------------------------------------------------------------------------------------frequencies
5. Which configuration has min distortion..?------------------------------------------------distortion..?-----------------------------------------------------------------------class ----------------------class A a. CLASS A
b. CLASS B
c. CLASS C
d. CLASS AB
6. Which of the following is not system software..?------------------------------software..?----------------------------------------------------------------------------------------------compiler a. Linker
b. Loader.
c. Compiler
d. none
7. Min No, of NAND gates required to realize the function AB----------------------------------------------AB------------------------------------------------------2 -------2
8. Flip Flops mainly used for--------------------------------------------for-----------------------------------------------------------------------------------------------------------------------memory -----------memory elements
9. Which is noise free----------------------------------------------------------------------free------------------------------------------------------------------------------------------------FM -------------------------FM a. AM
b. FM..
c. Both
d .none
10. Terrestrial TV propagation System used in India---------------------------------------------------------------PA India---------------------------------------------------------------PALL a. PAL
b. NTSC
c. DFS
11. Skin depth of an waveguide doesn’t depend on---------------------------------------------------------------temperature
a. freq
b. temp
c .length of the conductor
d.Type of material
12. Transformer rating expressed in-------------------------------------------------------------------------------kilo Voltampere (KVA)
13. Electrical energy can be measured using----------------------------------------------------------------------kilo watt-hour (kWh)
14. An ideal opamp has---------------------------------------------------------------------------------------------Infinite B.W
15. Restivity range of semiconductor------------------------------------------------------------------------------10 ^ -4 to 10 ^7
16. They give modulation index, carrier power ask us to find total power--------------------------------------Pt=Pc(1+(m*m/2))
17. In JFET if Vds increased what happen to Ids.?----------------------------------------------------------------Ids decreases
18. They give some freq and ask us to find Image Freq…?-----------------------------------------------------Fi=F(given)+2(I.F=455kHz) 19. In an Unbiased semiconductor the current is zero because of----------------------------------------------transistor in cut-off region
20. If BJT is in Cutoff region---------------------------------------------------------------------------------------across load A. Max voltage appears across load B. a.Max voltage appears across Transistor.
21. Decibel used to measure--------------------------------------------------------------------------------------power level
a. power
b. voltage
c .current
d .power level
22. In RC coupling the value of C should be high because-----------------------------less reactance--signal couples well---no distortion of signal
23. An ideal voltage source charges capacitor in---------------------------------------------------------------instantaneously
24. They give Vmax and Vmin and ask us to find modulation index?--------------------------------------------m= ((Vmax-Vmin}/ (Vmax+Vmin)
25. A voltage source of 5v with internal resistance 2 ohm can transfer max power to load when the value of load resistance is-----2 ohm
26. In a communication system, noise is most likely to get into the system
(A) At the transmitter
(B) In the channel============answer
(C) In the information source
(D) At the destination
27. When modulation frequency is doubled, the modulation index is halved, and the modulating voltage remains constant, the modulation system
(A) Amplitude modulation
(B) Phase modulation
(C) Frequency modulation==========answer
(D) Angle modulation
28. Impedance inversion may be obtained with
(A) A short ? circuited stub
(B) An open ? circuited stub
(C) A quarter ? wave line================answer
(D) A half ? wave line
29. HIGH frequency waves are
(A) Observed by the F2 layer
(B) Reflected by D layer===========answer
(C) Capable of use for long-distance communication on the moon
(D) Affected by the solar cycle
30. Which one of the following terms does not apply to the Yagi-uda array?
(A) Good band width
(B) Parasitic elements
(C) Folded dipole
(D) High gain============answer
31. A duplexer is used
(A) To couple two different antennae to a transmitter without mutual interference
(B) To allow one antenna to be used for reception or transmission without mutual interference========answer
(C) To prevent interference between two antennae when they are connected to receiver
(D) To increase the speed of the pulses in the pulsed radar
32. Indicate which of the following system is digital
(A) Pulse ? Position modulation
(B) Pulse ? Code modulation=========answ modulation=========answer er
(C) Pulse ? Width modulation
(D) Pulse ? Frequency modulation
33. A forward error correcting code corrects errors only
(A) Requiring partial retransmission of the signal
(B) Requiring retransmission of entire signal
(C) Using parity to correct to errors in all cases
(D) Requiring no part of the signal to be transmitted==========answer
34. A typical signal strength received from a geosynchronous communication satellite is of the order of
(A) A few milli watts
(B) Kilo watts
(C) Watts
(D) Few pico watts========answer
35. Telephone traffic is measured
(A) With echo cancellers
(B) By the relative congestion
(C) In terms of the grade of service
(D) In erlangs===================answer
36. Positive logic in a logic circuit is one in which
(A) Logic 0 and 1 are represented by 0 and positive voltage respectively==========answer
(B) Logic 0 and 1 are represented by negative and positive voltages respectively
(C) Logic 0 voltage level in higher than logic 1 voltage level
(D) Logic 0 voltage level is lower than logic 1 voltage level
37. A half-adder can be made from
(A) Two NAND gates
(B) A NOT gate and an OR gate
(C) An AND gate and an OR gate
(D) An AND gate and an X-OR gate=========answer
38. Which of the following devices has its characteristics very close to that of an ideal current source?
(A) Field effect transistor
(B) Transistor in common bas mode
(C) Zener diode============answer
(D) MOSFET
39. The main use of a common base transistor amplifier is
(A) As voltage amplifier===============answer
(B) Current amplifier
(C) For matching a high source impedance to a low load impedance
(D) For rectification of a.c. signal
40. A class-B amplifier is biased
(A) Just at cut-off===============answer
(B) Nearly twice cut-off
(C) At mid point of load line
(D) so that IB equals jut IC
41. If the peak transmitted power in a radar system is increased by a factor of 16, the maximum range will be increased by a factor of
(A) 2 (B) 4 (C) 8 (D) 16=========== 2
42. A high PRF will (indicate the false statement)
(A) Make the returned echoes easier to distinguish from noise=======answer
(B) Make target tracking easier with conical scanning
(C) Increase the maximum range
(D) Have no effect of the range resolution
43. A solution to the ?blind speed? problem in a radar system is to
(A) Change the Doppler frequency
(B) Vary the PRF==============answer
(C) Use mono pulse
(D) Use MTI
44. The number of active picture elements in a television image depends on
(A) Fly back time======================answer
(B) CRT screen size
(C) Received band width
(D) FB ratio of receiver antenna
45. In a color TV, the three primary colors are
(A) Red, orange and blue
(B) Red, blue and green=============answer
(C) Red, green and yellow
(D) Red, orange and green
46. Polarization in a dielectric is given by===========P=(1-x)E A. P=xE
B. P= (1-x) E
C.P= xeE e=permivity...x=suspectance
47.ht of geostationary satellite---------------------------------------------------------------------------------------------36000 Km
48.minimum freq range of satellite comm----------------------------------------------------------------------------------C-band(3.7-4.2MHz)
49.what happens to D-layer at day_time-----------------------------------------------------------------------------------ionization/absorption of signals
50.the nyquist rate of sampling is ----(2Fmax,Fmax,1/2Fmax,etc)-----------------------------------------------------2Fmax
51.how many electrons does the donor impurity phosphorus continue---(1,2,3,4)-------------------------------------1
52.transmission of light through optical fiber works on principle of ---(total internal reflection,total internal refraction,etc)-------reflection
53.SHF can be used for ---(radio,satellite,surface wave)----------------------------------------------------------------satellite
54.deviation finding in fm ?-------------------------------------------------------------------------------------------------Phase locked loop (PLL circuit)
55.no. of frames in indian pal system ?-------------------------------------------------------------------------------------25 frames/second
56.which radar measure velocity ,height n distance ?---------------------------------------------------------------------CW DOPPLER radar (not simply CW)
57.when transistor in cut-off or saturation,the circuit behaves independent of transistor------options----variation,stage,etc-------------------------- stage..cos it behaves like a switch and effect of transistor stage is equivalent to switch
58.If efficiency of amplifier is 80% then its definately---(class A,B,AB,C)----------------------------------------------C
59.buffer is useful for---(isolation of stages,emitter follower configuration,etc)---------------------------------------isolation of stages
60.for transmission of MW radio.we use---(dipole,antennae on vertical masts,etc)--------------------------------------vertical masts
61.the most severe effect of noise is seen in---(transmitter,channel,receiver,etc)---------------------------------------channel
62.if freq deviation is 15KHZ,modulation signal 75 Khz,then theoretical BW i upto 8th component--(150,240,480,etc)--150
63.Balanced modulator is used for removal of---(carrier,USB,LSB,etc)----------------------------------------------------carrier
64.In open loop systems,control signal depends upon---(human reference,independent of output,cannot be determined,etc)----------ind of out
65.the laplace transform of 't'---(s,s^2,1/S^2,etc)-----------------------------------------------------------------------1/s^2
66.at what freq is attenuation highest in optic-fiber-----------------------------------------------------------------------around 600 nm
67.when CCIR-B blanks signal—during vertical OR horizontal retrace???------------------------------------------------vertical
68.Modulation of amplitude includes-CHANGE IN AMPLITUDE,change in freq,both,other--------------------------------amplitude change
69.Base of transistor is-HIGHLY,heavily,moderately,not doped----------------------------------------------------------moderately
70.CMRR for ideal Diff Amplifier is-0,unity,less,MORE THAN UNITY-------------------------------------------------------more than 1 (infact infinity)
71.At absolute zero,valence electrons occupy---(valence band,forbidden band,conduction band,valence electrons disappear)----------val band
72.the transition region in a unbiased diode consists of---(free charges,immobile carriers,minority carriers,etc)------immobile
(already solved above) ===================================================================================== ========================= <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ===================================================================================== =========================
===================================================================================== ========================= SECTION-2 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ===================================================================================== =========================
1.horse power is unit of-------------------------------------------------------------------------------------------------------power
2.electron volt is unit of:------------------------------------------------------------------------------------------------------energy
3.what is nibble----------------------------------------------------------------------------------------------------------------4bits
4.centroid is concerned with: mass,mass and weight,plane area------------------------------------------------------------plane area
5.which is most effective nuclear power plant or thermal power plant------------------------------------------------------nuclear
6.ignition quality of petrol is measured by:----------------------------------------------------------------------------------octane number
7.primary battery is:reversible process,irreversible process---------------------------------------------------------------irreversible
8.what a catalyst will do-------------------------------------------------------------------------------------------------------increase the reaction rate
9.what is applied when opening a lock with key:coplaner force,noncoplaner force,lever,torque---------------------------torque
10.when jet engine has most power:while leaving earth,atmosohere---------------------------------------------------------inc wd altitude
11.what represents the current:left hand,right hand,thumb.-------------------------------------------------------------------thumb
12.magnetic flux density--------------------------------------------------------------------------------------------------------weber
13.noise is measured as:pitch,decibel------------------------------------------------------------------------------------------decible
14.aluminum alloy is used in piston:it is light,it is strongest,it is shock less,less wear off-----------------------------------light
15.when a light is passed through a higher refractive index what will happen-----------------------------------------------velocity decrease
16. Capacitance of a cell measured in?----------------------------------------------------------------------------farad
17.To made House use electric heater which metal/element is better?----------------------------------------aluminium
18. Internal resistance of ideal current source?-----------------------------------------------------------------infinite
19. Integral of (dx / (xlogx))?------------------------------------------------------------------------------------log(log x)+c
20. Earth &geostationary satellites have same /relative-------------------------------------------------------angular velocity a.accleraton
b.velocity
c.angular velocity
21. Sound waves are----------------------------------------------------------------------------------------------longitudinal A .Longitudinal
B. Transverse
C both
D .neither.
22. Demultiplxer can called as?-----------------------------------------------------------------------------distributor
data
23. Set of instructions meant for to do some task is called.---------------------------------------------------Programme
24. Properties Alkali metals.----------------------------------------------------------------------------------- * Lower densities than other metals * One loosely bound valence electron * Largest atomic radii in their periods * Low ionization energies * Low electronegativities * Highly reactive
25. Break down occurs in diode because of.-------------------------------------------------------------------avalanche breakdown( more than 10 V)
26. If u wants to connect two systems through telephone line which of the following u will use..?---------modem A. Bus
B.Modem
C.Router
27. Inductor opposes sudden changes in---------------------------------------------------------------------Current
28. Which is not a non renewable energy---------------------------------------------------------------------wind energy a. petrol
b.Coal
c.Wind energy
d.nuclear
29. Which material is widely used for making solar cell?----------------------------------------------------silicon
30. Cell converts.---------------------------------------------------------------------------------------------chemical to electrical A. Chemical energy into electric energy
B. electric energy into chemical energy
31. Steel pipes made from-----------------------------------------------------------------------------------galvanized iron
32. Human being is------------------------------------------------------------------------------------------closed loop system with multiple feedback A. open loop sys’m B.closed loop sys’m with single feed back. C. closed loop sys’m with multiple feed back.
33. If the gain of the open loop sys’m is doubled then gain margin will become ------------------------doubled
34. Corrosion of aluminum is not formed because of------------------------------------------------------epoxy paint
35. If the speed flow in pipe of diameter 6 mm is 5m/s.If this pipe is connected to another of diameter 3 mm, then speed will be---10m/s
36. They give change in force and change in diameter of a square plate. Ask us to find change in pressure---(change in area/change in area)
37. They give three sets of measurements .Which are sets forms triangle------------------the one where a+b>c where a,b,c are sides taken in any order
38. First aid of electrical shock victim----------------plug-off power-------move victim by a wooden stick or dry clothes sideways
39. The performance (function) of fuse doesn’t depend on -------------------------------(depends on both..so methinks options are incomplete)---
a. Type of material
b .Length of the material..
40. Annealing makes the material... (Effect of annealing)----------------------------------heat treatment to improve softness and ductility
41. what does the symbol "j" represents in vector----------------------------90 degree anticlockwise movement (imaginary-axis)
42. Sulphation in Lead acid battery--------------------------------------crystalline lead sulphate---affects charge storing capacity--slows charging up time
43. Transient current------------------------------------------------------------sharp fluctuation of current
44. Principle of hydrogen bomb--------------------------------------------------nuclear fusion
45. radio activity is the property of----------------------------------------------elements with atomic no greater than 82 (Pb)
46. above curie temperature, magnetic material will become-------------------non magnetic or magnetic insulator
47. series circuit current----------------------------------------------------------is same throughout (I=I1=I2=I3=In)
48. byte= ___ bits-----------------------------------------------------------------8
49. Control and arithmetic logic section is known as-----------------------------CPU
50.Micro computer is a ----------------------------------------------------------personal computer
51.power factor of a resistor----------------------------------------------------1
52.hexadecimal digit-------------------------------------------------------------0-9,A-F
53.fluorescent tube related qn---------------------------------------------------choke coil
54.change in dimension during the process of magnetisation------------------magnetostriction
55.in nuclear reaction , conservation of-----------------------------------------mass and energy both
56.unit of inductance-------------------------------------------------------------henry
57.petrol in india ..octane no.?---------------------------------------------------90-95 (generally 91)
58.controlling device for small load?? [related to servo motor etc.]------------potentiometer
59.viscosity of gas directly proportional to-------------------------------------square root of temperature
60.instruments to have wide range of scale------------------------------------logarithmic scale
61.rating of electrolytic capacitor-----------------------------------------------farads
62.name of electric motor-both rotor and stator rotating at equal speed------synchronous motor
63.in reversible adiabatic process, change in entropy?-------------------------0
64.calory is a measure of??------------------------------------------------------heat energy
65.compressed air inside a tire, what will happen if air passes through a hole??------adiabatic process
66.work done in adiabatic change in gas----------------------------------------(P1V1-P2V2)/(gamma-1) or nR(T1T2)/(gamma-1)
===================================================================================== ====== 67. related to carnot cycle in carnot engine 68.maximum efficiency of carnot engine
here is a brief summary of the 4-steps of carnot cycle
Heat transfer from the working fluid to the low-temperature reservoir (Condenser). Adiabatic increase in the temperature of the working fluid (Heat Pump). Heat transfer from the high-temperature reservoir to the working fluid (Boiler). Adiabatic decrease in the temperature of the working fluid (Turbine).
An important conclusion from Carnot cycle analysis is that the maximum theoretical efficiency of heat engines is directly related to: efficiency = D(T2-T1)/T2
where: T2 is the maximum operating temperature on absolute scale (K) T1 is the minimum operating temperature on absolute scale (K)
For a heat engine operating between 300oC and 100oC, with a DT of 200 degrees, this maximum efficiency would be: efficiency = 200/(300 + 273) x 100 = 34.9%
===================================================================================== ===========
69.something related to mix of ice and water-------------------------------------------all exists at triple -point
70.efficiency of otto cycle----------------------------------------------------------------60 %
71.floating battery bus or something----------------------------------------------------used in IC engines
72.longitudinal wave prorogation--------------------------------------------------------compression and rarefraction
73.unexcited single phase synchronous motor------------------------------------------called as repulsion induction motors
74.inductance related question
75.advantage of sampling a) simple ckt b) high speed transmission data=============================================================answer c) all of the above
76.capacity of ecetrical cell a) Watth ==============================================================================answer b)Watt
c)ampere d) amp/hr
77.metal to be used in electric heater a)copper b)nichrome=========================================================================== =answer c) platinum d) tungstun
78.computer ic works efficiently because a) top-bottom b) system c)two stage d) 2 state
79.func of fuse wire does not depend upon a) itd length b) its radius============================================================================answ er
80.material of spring should be---------------------------------------------------------------------------------------------steel with high carbon variety
81.skin effect does not depend upon--------------------------------------------------------------------------------------size of wire
82.aluminium does not corrode with atmosphere------------------------------------------------------------molecular level stability (but it does corrode in extreme enviroments like acids...but slowly)
83.thyrister is also termed as a) dc switch b) ac switch============================================================================ans wer c)both a& b d) square wave switch
84.steel pipes are made through which welding---------------------------------------------------------------------------arc welding
===================================================================================== ========================= 85.a particle whose motion is described by x=asinwt, y=asinwt z=ut moves along a) screw path with constant velocity and increase in accelaration b) screw path with constant velocity and accelaration c) screw path with increased velocity and accelaration d) screw path with decreased velocity and increased accelaration
Answer is 'C' however if the question is x=asinwt,y=acoswt,z=ut...the answer will be 'B' the answer can be arrived by finding d/dx,d/dy,d/dz which are Vx,Vy,Vz then finding resultant using sqrt(Vx^2+Vy^2+Vz^2) similairly again by differentiating we obtain Ax,Ay,Az components of Acc'n...then find their resultant ..similiarly
===================================================================================== =========================
86. name ,numbers to be given to evaluate instructions a) program b)instruction c)data================================================================================ = answer
87. unit of inductance and capacitance-------------------------------------------------------------------------------------Henry and Farad respectively
88.why condenser used in tube light?--------------------------------------------------------------------------------------current discharge
89.period of geostationary satellite---(3 hrs,10 hrs,24 hrs,etc)---------------------------------------------------------24
90.how many geostationary satellites to cover entire earth---(2,3,4,etc)-----------------------------------------------3
91.Unit of magnetic field intensity---(A/m,A/m^2,A-m,etc)-------------------------------------------------------------A/m
92.what parameters control the state of gas--(P,V,T,all)-----------------------------------------------------------------all
93.Body absorbing all radiations-----------------------------------------------------------------------------------------PERFECTLY BLACK BODY.
94.Black Body-------------------------------------------------------------------------------------------------------------ABSORBS/transmits all radns.
95.Emmisivity of white body is-------------------------------------------------------------------------------------------HIGHER than black body.
96.Hookes law states that stress is proportional to---------------------------------------------------------------------STRAIN.
97.if on insertion of dielectric,energy stored becomes one fifth..then dielectric strength is--(5,1/5,25,1/25)--------5
98.A material having resistivity=2 times copper covers a copper metal sheet of same thickness of resistance 2 ohm ,then resistance of composite sheet is---(6,2/3,4/3,3/4)-------------------------------------------------------------------------------------------------------3/4
99.the prominent force in an atom is ---(gravitational,nuclear,electrostatic,etc)---------------------------------------nuclear
100.As compared to a thermal plant,nuclear plant is---(more effecient,less effecient,depends upon material,etc)------more effecient
101.if multiplication of n numbers is 1,then their sum ---(n(n+1)/4,divisible by n,1,always less than n)-----------------always less than n
102.the material used in solar cells is---(germanium,silicon,etc)-----------------------------------------------------------si
103.in primary cell---(chemical reactions are reversible,irreversible,etc)-------------------------------------------------irreversible
104.The unit of charge is---(coulomb,ampere,etc)------------------------------------------------------------------------coulomb
105.Two taps A(requires 15 mins to fill a tank) and B(12 mins), time required to fill d tank if both taps used ?--------(20/3) mins
106.IR depends on-R VALUE,dirn of current flow,none,ALL----------------------------------------------------------------??????
107.1st law of thermodynamics based on----------------------------------------------------------------------------------LAW OF CONSVN OF ENERGY.
108.Diesel Quality by-------------------------------------------------------------------------------------------------------CETANE NO.
109.Internal Energy Dir Prop to-VOL,pr,temp,none------------------------------------------------------------------------temp
110.Brayton Cycle is-CONST PR, vol,temp,other---------------------------------------------------------------------------Const pressure
111.For Const Vol cycle work done is--------------------------------------------------------------------------------------0.(work=P*change in volume)
112..the first sub-shell has the capacity of how many electrons---(2,4,1,8)----------------------------------------------2
113..to prevent short circuit of surface waves, the polarization used is---(vertcal,horizontal,circular,etc)-------------circular
114..when ray of light enters a medium of higher refractive index,velocity--(increases,decreases,remains same,etc)----slower
115.iron cores in transformers are laminated to prevent---(eddy current,copper loss,etc)-----------------------------eddy loss
116.Wein bridge is used to measure---(resistance,frequency,capacitance,inductance)---------------------------------capacitance
117.which circuit is current transeint,,,,L,C,R-------------------------------------------------------------------------------L
118.what happens above curie temperature..(sometin related to dia,para,ferromagnetism)----------------------------magnetism is lost-material becomes paramagnetic
119.why radioactivity of elements------------------------------------------------------------------------------------------nuclear fission
120.principle of hydrogen bomb--------------------------------------------------------------------------------------------nuclear fusion
121..aluminum is used to make engine and pistons cos---(light,shock resistant)-------------------------------------------light
122.tolerance of gold band in resistor---(2%,5%,10%,20%)---------------------------------------------------------------5
123.if diameter of two pipes in ratio 2:1 and velocity 1:2,then volume per unit second---(1:8,8:1,2:1etc)----------------2:1
124.Magnetic tapes can be used for--- (input,secondary-storage,all) -----------------------------------------------------all
125.COMPONENT j IF COUNTERCLOKWISE THAN WAT IS ITS ANGLE?--------------------------------------------------------90 degrees
126.KIRCHOFFS LAWS APPLICABLE TO WHICH ? A.C OR D.C ?-----------------------------------------------------------------both
127.S.P,D,F FORMAT OF BERILLIYIUM N COBALT?-----------------------------------------------------------------------------berillium--1s2 2s2 cobalt----[Ar] 4s2 3d7
128.HEAT IS MEASURED IS WAT ?---------------------------------------------------------------------------------------------calories
129.eddy currents can be minimized how ?---------------------------------------------------------------------------------core lamination
130.poles of magnet can be measured by which rule ?---------------------------------------------------------------------right hand rule
131.OCTANE % OF INDIAN PETROL ?------------------------------------------------------------------------------------------90-95 (91 generally)
132.In RLC ckt,during resonance, impedance is-MIN,max,0,other.---------------------------------------------------------minimum (purely resistiv
133.Momentum unit same as-------------------------------------------------------------------------------------------------IMPULSE (Ns)
144.PE is highest at WHEN OBJECT thrown IS AT---------------------------------------------------------------------------Max height
145.Curve y=sinx at x=0 and x=pi/4 is -------------------------------------------------------------------------------------0 and 1/(sqrt(2))
146.Kirchoffs Law for current is rel to-ELECTRIC CKT,junction,closed loops,electronic ckt-------------------------------junction
147.Weight of a person is max at-------------------------------------------------------------------------------------------Surface of earth
148.what is motor called when its stator rotates at same speed as its actuator-------------------------------------------syncronized motor
Key of sample paper from IAF EKT here is the answer key for GENERAL ENGINEERING
1B
2A
3B
4A
5A
6B
7A
8B
9C
10B
11B
12A
13A
14B
15C
16D
17A
18D
19A
20C
21A
22B
23D
24B
25C
26C
27B
28D
29D
30A
===================================================================================== ========================= <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
===================================================================================== =========================
===================================================================================== ========================= SECTION-3 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ===================================================================================== =========================
2.how many bits in a nibble? ---(2,4,8,10)-------------------------------------------------------------------------------4
13.DRAM consists of---(FET,MOSFET,BJT,etc)-----------------------------------------------------------------------------MOSFET
16)Permanent Memory-RAM,Dram,Rom,other-----------------------------------------------------------------------------Rom (it is actually EEPROM)
15.the set of circuits the store data is---(bits,circuit,registers)---------------------------------------------------------registers
16.Which of these is a open source software---(MS-windows,Mac-os,red hat linux,WIN ZIP)--------------------------WINZIP
3]micro-computer has a——–----------------------------------------------------------------------------------------------CPU
which is sequential access device? magnetic tape magnetic drive all of the above===========================================================================answe r
what does structural lang do? reduces the structure of prog. can be read by only programmer. all of the above===========================================================================???
set of instructions-------------------------------------------------------------------------------------------------------------program
BCD is used to convert binary decimal=============================================================================== ==answer Ascii
recursion is used in========================================================================??? stack queue
link list all of the above
which is offline device======================================================================??? connected to cpu not connected to cpu direct storage all of the above.
half adder is used ans 3,carry
in a simple binary tree node is defined as n n-1 n-2 n/2
if nibble is transferred at rate 128 then 32 64=================================================================================== ==answer 256
240
what does fan out means-------------------------------------------------------------------------------------------------------Number of components that an IC can drive at its output
BCD is: encoder============================================================================== ====answer decoder multiplexer demultiplexer
one input many output encoder decoder multiplexer demultiplexer========================================================================== ===answer
nand and nor gate is result of how many gates?
which is not a correct equation of boolean alzabra: A+0=A A+A=A
A+1=1 X=+1================================================================================= ===answer
lowest power dissipitation CMOS================================================================================ ====answer TTL MOSFET ECL
first generation computer used valves================================================================================ ===answer Transistor ICs SSI
low pass filter is Integrator============================================================================= ===answer differentiator Comparator
microprocessor and microcomputer providing access to many use---------------------------------------------------------- multi-user system
Which configuration has min distortion class a===================================================================================a nswer class b class c class d
which memory need to be refreshed everytime dynamic ram===============================================================================ans wer static ram prom rom
cpu consists of Arithmetic and logical unit=====================================================================answer timing and control unit all of the above
where data is stored in cpu.
Register============================================================================== ====answer flip flop
one question was like some thing to transfer through bus then which will be used: DMA================================================================================= ====answer Interrupt vector
one circuit was given and option were differentiator---------------------------------------------------------------------------------------------------------------------high pass filter Integrator------------------------------------------------------------------------------------------------------------------------low pass filter
What doesn’t assembler do
Store the code Convert into machine code Some option--------------------------------------------------------------------------------------------------------------(dis option HAS to be the answer) All of the above
Moving of data from main memory to secondary memory Swapping============================================================================= =====answer
Spooling Exchange Some option
One question based on storage with option CCDs================================================================================= ====answer Disk Tape
When the flip flop is high------SET--------When low ----------------------------------------------------------------------------reset
2) A BYTE= BITS ?------------------------------------------------------------------------------------------------------------8
9)Octal repn for 11111010-81,372,78,other-------------------------------------------------------------------------------372
2)Which is d 1st Computer-------------------------------------------------------------------------------------------------UNIVAC
3)CPU consists of------------------------------------------------------------------------------------------------------------ALU & CONTROL UNIT
4)For registering instructions in computer--------------------------------------------------------------------------------INDEX REGISTER
5)Which is d 1st generation computers-MAGNETIC TAPE,vaccuum tubes,minicomputers,all.----------------------------vaccum tubes
6)Which is for code of instructions-----------------------------------------------------------------------------------------ASCII
Key of sample paper from IAF EKT here is the answer key for specialist.....COMPUTERS 1C
2C
3D
4C
5B
6A
7B
8A
9D
10C
11C
12A
13B
14
15D
16D
17
18A
19D
20C
===================================================================================== ========================= <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ===================================================================================== =========================
===================================================================================== ========================= SECTION-4 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ===================================================================================== =========================
1) zeroth law of thermodynamics-----------------------------------------------------------------------------------------------thermal equilibrium of bodies
2) manganese in steel makes it: ductile, malleable, harder-------------------------------------------------------------------harder
3) efficiency of jet at altitude :increases, decreases,-------------------------------------------------------------------------increases
4) volume of surface shrinks cos of: adhesion, cohesion---------------------------------------------------------------------surface tension
6) weld spatter means---------------------------------------------------------------------------------------------------------defect
7) result of arc welding : composition of filler in electrode, inert gas liberation--------------------------------------------???
8) volatility of petrol is at temp : higher than diesel, lower than diesel-----------------------------------------------------lower than diesel
9) a perfect fluid is : compressible, viscous, all of the above----------------------------------------------------------------incompressible
10) sum prob related to apot welding-----------------------------------------------------------------------------------------????
11)father of industrial engg?--------------------------------------------------------------------------------------------------Fredrick Winslow Taylor
12) grant chart relates to?----------------------------------------------------------------------------------------------------???
13) continuous chips helps in : gud surface finish, easily disposable-------------------------------------------------------gud surface finish
14) 2 parallel shafts to be connected in perpendicular by: bevel, spiral , helical or worm gears--------------------------helical gear
15) a question on gear cutting------------------------------------------------------------------------------------------------???
1)mercury does not wet glass, which fluid prop-COHESION,adhesion,ST,Visco-----------------------------------------Surface tension (ST)
2)fluid has specific-SHAPE,vol,temp,pr.----------------------------------------------------------------------------------Shape
3) petrols quality by------------------------------------------------------------------------------------------------------OCTANE NO
4)Thermal eff of 4str compared to 2 stroke is ----------------------------------------------------------------------greater (but lesser power than 2 stroke)
5) Durng suction stroke of diesel engine---------------------------------------------------------------------------------FUEL AIR MIXTURE.
6) Fine mixture of fuel air in petrol engine is called---------------------------------------------------------------------CARBURRETION.
7)TIG welding requires----------------------------------------------------------------------------------------------------ARGON N HELIUM.
8)Ideal Fluids follow-------------------------------------------------------------------------------------------------------PASCALS LAW.
9Process havn ini n final states same-------------------------------------------------------------------------------------CYCLE.
10)Cyclic Process havn ini n final states same----------------------------------------------------------------------------ZEROTH LAW.
11)DC series motor used in-SHAPERS,lathe,cranes,other-----------------------------------------------------------------cranes
12)Open cycle behavior over closed cylce----------------------------------------------------------------------open cycle MORE STABLE BUT LESS ACCURATE.
13)Not a vector quantity- MI,force,accln,velo-----------------------------------------------------------------------------MI (moment of inertia)
14) raindrops have spherical shape coz of-ST,visco.---------------------------------------------------------------------surface tension
15)Steffan-Boltzman law----------------------------------------------------------------------------------------------------ABS TEMP RAISE 2 FOUR.
16)KIRCHOFFS LAW OF HEAT TRANSFER-----------------------------------------------------------------------------------RATIO.
17)3 PHASE POWER SUPPLY,phases separated by-------------------------------------------------------------------------120 DEGREES.
18)Violating laws of thermo------------------------------------------------------------------------------------------------PMM.
19)CPM has-One time ….---------------------------------------------------------------------------------------------------????
20) Not advtg of Motion study---------------------------------------------------------------------------------------------Reducing Inventory costs.
21)Best weldable-.15%CS,.25%CS,// .5%CS,.75%CS--------------------------------------------------------------------????
22) Drawn into wires-------------------------------------------------------------------------------------------------------Ductility.
23)Carburising over Oxidising flame-Carbu-LESS,more effective--------------------------------------------------------More
24)Not renewable-NUCLEAR,solar,biomass,wind.-------------------------------------------------------------------------nuclear
25)Dew pt of moist air-----------------------------------------------------------------------------------------------------vapor condensation temperature
26) Density of water highest at-0C,100C,//0K,200C.--------------------------------------------------------------------actually 4 degrees centigrade (277K)
27) Electrolyte-DISTILLED WATER,salt soln------------------------------------------------------------------------------salt solution
28)PV=mRT applicable for-adiabatic,isothermal changes,BOTH,other---------------------------------------------------both
29)All modes of HT in-BOILER---------------------------------------------------------------------------------------------,elec heater,steam cond.
30)Not a boiler classfn type------------------------------------------------------------------------------------------------Acc TO QUALITY OF WATER.
7.whats the measure of quality of petrol---(octane no,cetane no,etc)--------------------------------------------------octane
8.self ignition diesel engine as compared to petrol has?----(lower ignition temp,higher ignition temp,etc)-----------lower
9.the efficiency of compressor at high altitude---(increases,decreases,same,etc)-------------------------------------decreases
12.(not so sure) the velocity ratio of 8 teeth wheel and 100 teeth wheel in third gear wheel is(1:12.5,1:800,etc)-----1:12.5
31)Cam provides-OSCILLATING/ rotating/reci/other motion-----------------------------------------------------------?????
32) Brazing ----------------------------------------------------------------------------------------------------------------HARD SOLDERING OF BRASS.
29)Acetylene filled in Cyl is in-LIQ/gas/solid/other state.-------------------------------------------------------------Liquid (high pressurized)
17.if petrol is used in deisel engine-----(knocking increases,effeciency decreases,black smoke,will not work)-------knocking inc
25)In 4 stroke engine power str occurs for every------------------------------------------------------------------------ 2 REVLN OF CRANKSHAFT.
32.in 4-stroke engine,the cycle completes after how many revolutions of crank shaft--(2,4,1+1/2,2+1/2)------------2
4]carnot-cycle –its effeciency and working basics------------------------------------------------------------------------(refer above)
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===================================================================================== ========================= SECTION-5 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ===================================================================================== =========================
1)what is the use of dummy coils in induction motor?-----------------------------------------------------------------------???
2)value of inductance depends on??------------------------------------------------------------------------------------------switching frequency
3)number of devices connected together to store digital data is?-----------------------------------------------------------register a)circuit b)register c)varacter d)bits
4)the flow and timing of data to and from the micro processor is done by--------------------------------------------------control pin a)control pin b)data pin c)address pin d)....
5)given transfer function 2/(s+2) and w=10 find gain-----------------------------------------------------------------------0.196 a).44 b).33 c).196 d)...
6)induction instruments are widely used in----------------------------------------------------------------------------------??? a)voltmeter b)ammeter c)wattmeter d)frequency meter
8)kWh meter is----------------------------------------------------------------------------------------------------------------recording type a)recording type b)indicating type c)deflecting type d)..
9)synchronous motor is-------------------------------------------------------------------------------------------------------induction type a)induction type b)cylindrical pole type c)salient pole type d)..
10)for dc shunt motor when polarities are reversed-------------------------------------------------------------------------reverses direction a)it stops b)reverses direction c)it burns d)...
11) high pass filter acts as----------------------------------------------------------------------------------------------------differentiator a)integrator b)differentiator c)both d)none
12) when storage battery turns weak it is restored by-----------------------------------------------------------------------distilled water a)a dose of H2SO4 b)battery restorer c)distilled water d)none
13)when the battery of multimeter turns weak it shows---------------------------------------------------------------------accurate reading a)accurate reading b)lower reading c)more reading d)no reading
14) direction of induced emf in ind motor is given by-----------------------------------------------------------------------right hand rule a)flemmings L.H.R b) right hand rule c)thumb rule d)..
15)for balanced 3 ph Vyb lags Er by a)120degree b)30degree c)60degree d)90degree
16)the B.W for transmission of n signals with freq Fm is--------------------------------------------------------------------2nFm a)2Fm b)2nFm c)...d)...
17)schmitt trigger is----------------------------------------------------------------------------------------------------------squaring circuit a)squaring ckt b).....c)...d)...
18)capacitor is----------------------------------------------------------------------------------------------------------------conductor filled with dielectric a)insulator filled with dielectric b)conductor filled with dielectric c)...d)...
Key of sample paper from IAF EKT here is the answer key for specialist .....ELECTRICAL,ELECTRONICS AND INSTRUMENTATION 1C
2A
3A
4B
5D
6
7
8B
9
10D
11B
12C
13C
14D
15B
16C
17C
18D
19D
20A
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===================================================================================== ========================= SECTION-6 <<<<<<<<<<<<<<<<<<<<<<<<<>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> ===================================================================================== =========================
1.catalyst iz used for--------------------------------------------------------------------------------------------------------alters rate of reaction (slow down the reaction rate, change in product part, inc the rate of reation…………)
2.electron spin is given by--------------------------------------------------------------------------------------------------bohr ( plank, bohr………………)
3.max value of [email protected][email protected]----------------------------------------45 degrees (at @= 30 deg., 45, 60, 90………….)
4.something related to prism ref index were given one angle is given and other angle has to find---------------------n=sin[(A+D)/2]/sin(A/2)
n=refractive index A=refracting angle D=Deviation angle
5.latch is same as ------------------------------------------------------------------------------------------------------------DF/F ( RS F/F, JK F/F, d F/F …………….)
6.principle of hydrogen bomb----------------------------------------------------------------------------------------------uncontrolled nuclear fussion ( uncontrolled nuclear fission, controlled nuclear fission uncontrolled nuclesr fussion, uncontrolled nuclesr fussion…….)
7.ques related to radioactive half life time--------------------------------------------------------------------------------T=0.693/lambda T=half life time lambda=decay constant
8.property of radioactivity--------------------------------------------------------------------------------------------------gamma rays (atomic nuclei, gamma rays, UV rays…………….)
9.carbon in million form becoz----------------------------------------------------------------------------------------------catenation (it is tetravalent, isomers, catenation…………..)
10.isotopes r------------------------------------------------------------------------------------------------------------------same atomic no
( hav same atomic no. ,diff nuclei, diff no of protons……………………)
11. 2 sides of triangle r 10cm ,8cm 3rd ? when d sides r in AP------------------------------------------------------------either 6cm or 12cm ( 8cm,11cm………)
12. 2882 arrangenet of electrons in an atom hav not true from options--------------------------------------------------belongs to group 2 ( dis atom belongs to group 2 ,……………………..)
13. in potassium-------------------------------------------------------------------------------------------------------------4s>3d ( 4s>3p,4s>3d,4s<3p………….)
14.hydrometer is used for measuring-------------------------------------------------------------------------------------specific gravity of solutions (water volume.water pressure………)
15.track ball is operated by-----------------------------------------------------------------------------------------------finger (finger, foot sound, plam…………… )
16 .in geostationary satellite max coverage angle-----------------------------------------------------------------------76 ( 76,60,90,70…………)
17. min velocity required in satellite to enter into in space--------------------------------------------------------------11.2km/s (escape velocity) ( 8km/s,8km/hr………)
18. plane in air when turned in left wats happens to the nose and tail---------------------------------------------------(actually tail of the airplane move toward the left, causing the nose turn to the right. ...) (nose raise and tail dowm, nose down tail raise, both remain in same position……….)
19. super conductor is-------------------------------------------------------------------------------------------------------diamagnetic ( ferro mag. ,ferri mag., para mag., dia mag., anti mag…………..)
20. 3 vectors r given as z, z+iz,iz now in z axis---------------------------------------------------------------------------??? ( a circle having 10 radius, ellipse, eccentric………..)
21. probability of occurance of A and B is ½ probability of not occurance of A and B is 1/ 6 wat is the probability of A--P(A)P(B)+P(A)P(B') (1/4…………………)
22. non-atomic resistance is----------------------------------------------------------------------------------------------capacitor ( resistor, capasitor, diode…………….)
23. transistor most commonly biasing------------------------------------------------------------------------------------voltage divider (emitter feedback, collector feed back, voltage divider, base bias…………….)
24. a transmitting signal havinf freq range 10.0mhz-10.1mhz hav sampling freq--------------------------------------200KHz ( 200khz, 100khz, .3mhz, .4 mhz……………)
25. in navy mari time communication is in-------------------------------------------------------------------------------VLF ( VHF,VLF,LF,SHF………..)
26. FSK is used in ---------------------------------------------------------------------------------------------------------telegraphy ( telegraphy,telephony,radiotransmission……….)
27. video signal is in-------------------------------------------------------------------------------------------------------AM ( FM, AM, PCM…………….)
28. something related to cover on TV screen as base cover used 4----------------------------------------------------degaussing ( degaussing, reduction of UV rays, proper color, spotin of electron beam on screen………)
29. colour in tv is due to--------------------------------------------------------------------------------------------------chrominance ( chrominance,luminous, color burst…………..)
30. TWT is used in magnetron why----------------------------------------------------------------------------------------??? ( gives high freq………)
31. which one is digital signal---------------------------------------------------------------------------------------------PCM ( PSK, FM, AM,PCM………..)
32. open loop sys compared to closed loop sys-------------------------------------------------------------------------unstable ( in stable less error,unstable ……)
33. efficiency of OPamp--------------------------------------------------------------------------------------------------???(question not clear) (1000000,10000,100,……………)
34. which one iz active filter----------------------------------------------------------------------------------------------RC ( RC, butterworth, notch……………)
35. what happens in –ve feed back---------------------------------------------------------------------------------------gain decrease,BW increases circuit operation more stable change in i/p and o/p impedances
36. which covers max area-----------------------------------------------------------------------------------------------circle wuth radius 4 ( circle with radius 4,triangle with sides 3,4,4 , triangle with sides 3,4,5)
37. monochromatic beam in----------------------------------------------------------------------------------------------laser ( laser…………..)
38. RADAR is used for-----------------------------------------------------------------------------------------------------all (defence survillence, detection of object, finds the vel of obj..)
39. component not in automatic control sys----------------------------------------------------------------------------oscillator (sensor,ascillator, error detector device..)
40. why v use tungsten wire in bulb-------------------------------------------------------------------------------------high resistance
( high resistance, high conductor, low r esistance…)
41. when power of transmitting signal is increased wat happens to its range?---------------------------------------increases (RADAR range equation)
42. microstrip is used in ?-----------------------------------------------------------------------------------------------planar microwave sensors built with PCB technology
43. question related to dipole?------------------------------------------------------------------------------------------???
44. electron mobility in ------------------------------------------------------------------------------------------------m(squared) per (volt-second) (mm,cm,angstrom……….)
45.in a molecule when oen atom is surrounded by four atom at corners the structure is---------------------------tetravalent (tetravalent, octavalent, ………….)
46. which is freq controlled system ------------------------------------------------------------------------------------PLL (PLL,VCO……………..)
47. roots of an eq are twice of eq 3x^2+3x-3=0 the other eq is-----------------------------------------------------x^2+2x-4=0
48. addition of two vectors P and Q-----------------------------------------------------------------------------------sqrt(P^2+Q^[email protected]) ( p^2+q^[email protected])
49. mostly used transmission code------------------------------------------------------------------------------------ascii-7
(ascii-7,ascii-8,edbic……………)
50.when dc supply is removed to clipper then it is-------------------------------------------------------------------rectifier (clampper,rectifier,demodulator,chopper…..)
51.something like in in length in solenoid something dec wat happens to 3rd value?------------------------------???
52. A tap fills bucket in 15min B tap in 13 mins if both tap are open for 1 min starting with b tap in hoe much time the bucket fills (14 ½,13 ½ , 14 ¾……………)
53. question related to poly hedral------------------------------------------------------------------------------------???
54. evaporation in atm compared with water evaporation in vaccum-----------------------------------------------decreases (inc,dec, remain same…..)
55. P no of persons promise to give Q$ but R persons did not give the S$ each in charity wat is the eq for charity given ( don’t remember the proper language)
56.red light wawlength can b detected by---------------------------------------------------------------------------emmision spectrometer ( lumicent light, some instruments sort were given…………..)
1) The triangle z, z+iz and iz of area or the side is 50 then in which plane it lies----------------------------------circle 1)circle
2)ellipse
2) If the area is increased by 69% then how much the side of the square will increase---------------------------30 % (new area=1.69*side^2
=(1.3*side)*(1.3*side)=i.e. 30% increase in length of side) 1)13%
2)69%
3)130%
3) To suppress ____________ we use some FM modulation technic------------------------------------------------??? 1)Carrier
2)USB
3)LSB
4) A central atom surrrounded by 4 pairs of electrons is called----------------------------------------------------tetrahedral 1)tetrahedral
2)linear
5) The area formed by curve y=cos x if x or y is 0 and pi/4--------------------------------------------------------0.707 (integrate cos x bet'n 0 and pi/4)
6) If the atomic number increases in periodic table then-----------------------------------------------------------affinity increases 1)the size of atom increases
2)affinity increases
7) Isotopes means-----------------------------------------------------------------------------------------------------same at no,different at wt
8) At zero Kelvin the semiconduction in semiconductor is because of----------------------------------------------???
9) To the physical balance when hot air is passed by a tube then--------------------------------------------------??? 1)Physical balance will be in equilibrium 2)It will move according to weight of the pan
10) One problem in sequence number--------------------------------------------------------------------------------???
11) In Geometric Progression all are +ve nos, first consecutive two nos are same then common ratio will be----1
12) TWT question------------------------------------------------------------------------------------------------------???
13) Most commonly used metal in solar cells-------------------------------------------------------------------------Si
14) Current conducting non metal------------------------------------------------------------------------------------graphite
15) Which of the following doesn't give flame test-------------------------------------------------------------------zinc
16) In audio amplifier reason for using R-C coupled-----------------------------------------------------------------removes DC component 1)Input and output will be same frequency
17) Advantage of closed loop system over open loop system-------------------------------------------------------more stable and more accurate 1)Less stable and less accurate 2)more stable and less accurate 3)less stable and more accurate
18) Sound waves travel in air as--------------------------------------------------------------------------------------longitudinal 1)Longitudinal
2)Traverse
3)Latitudinal
19) In star network which of the following are true------------------------------------------------------------------Line current=phase current line voltage=1.732*phase voltage 1)formula reg line voltage
2)Line current formula
20) Tank circuit is------------------------------------------------------------------------------------------------------parallel LC circuit is tank circuit 1)Series circuit
2)Parallel Circuit
21) If the frequency is beyond resonant frequency then the impedance is-----------------------------------------purely inductance 1)Purely capacitance
2)purely inductance
22) In physics from lenz law or faraday' law--------------------------------------------------------------------------no of turns 1)no of turns
2)No of turns and distance between adjacent turns
23) The time period of the pendulum depends on--------------------------------------------------------------------length (as well as gravity)
24) Weight of the bob---------------------------------------------------------------------------------------------------??? 3)dia of the bob
25) At 0 K semiconductor becomes------------------------------------------------------------------------------------insulator
1)dielectric
2)insulator
26) Water is flowing in a pipe of dia given and spped also given when it is attached with another pipe of diameter given then what is the speed of the water in second pipe -------------------------------------------------------------------------------------------------------------------------A1*V1=A2*V2 A=cross-section area of respective pipe V=water speed at respective pipe
27) Cal of linear strain if weight is given and length it elongates also given----------------------------------------Y=stress/strain=(Wt/A)/(l/L)
28) Angle of inclination of inclined manoeter--------------------------------------------------------------------------5075 degrees
29) Indirect way of generating FM------------------------------------------------------------------------------------Armstrong modulation 1)Varactor diode modulation
2)Reactance FET 3)Armstrong modulation
30) If S=1 R=1 then Q value of SR FF would be-----------------------------------------------------------------------Forbidden 1)Set
2)Reset
3)Forbidden
31) Most ionic compound-----------------------------------------------------------------------------------------------LiF 1)LiC
2)LiF
3)LiBr
32) In which compound will the sulphur will have more than one oxidation state----------------------------------H2S2O7
33) Alkali metals are characterzed by-------------------------------------------------------------------------------ionization 1)Solvency
2)Ionization
34) In the universe Carbon is in many compounds for the reason--------------------------------------------------catenation 1)Tetravalency 2)Isomerism
35) A polynomial given when divided by another polynomial given------------------------------------------------remainder 0--Denominator is factor non-zero--not a factor
36) Probablity of occurence of A is given neither A nor B also given and stated A and B are independent events. Probability of occurence of B will be---------------------------------------------------------------------------------??? 1)1/4
2)35482
37) Life cycle (Charge and discharge ) of Lead acid battery--------------------------------------------------------1200 cycles 1)1200 cycles
2)1000 cycles
38) logxto the base 8 +logxto the base 4+logxto the base 4=11 then value of x----------------------------------64 1)8
2)64
39) In H2O2 oxygen is lost by oxidation or reduction then which bond of oxygen with hydrogen is lost----------covalent 1)Covalent
2)Electro valent
40) Max value of sinA + cosAfor the value of A-----------------------------------------------------------------------45
1)30 degrees
2)45 degrees
41) Alkali metals occurs in cholorophyll------------------------------------------------------------------------------Ca (but even Mg is present but very low in composition) 1)Ba
2)Ca
3)Mg
42) Regarding series motor starting----------------------------------------------------------------------------------???
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43) In trajectile related question Range is given 100 m Initial velocity is 800 m/sec. find height of the object
-----R=u(squared)*[email protected]/g --------------------->find the value of @ i.e angle of elevation and then use it in the following formulae
H=u(squared)*[email protected](squared)/2g
the values in the question are improper..however the concept of solution is as discussed above
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44) Ball drops from height of 200 metres bounds back of 2/3 of its height when it comes to rest what will be total distance travvelled----------------------------------------------------------------1000 meters
45) No magnetic moment in--------------------------------------------------------------------------------------------------Non-ferromagnetic (actually diamagnetic) 1)Ferro magnetic substances
2)Non ferro magnetic
46) Same input given to NAND gate then the operation is said to be--------------------------------------------------------NOT 1)NAND
2)NOT
47) Susceptability unit--------------------------------------------------------------------------------------------------------unitless 1)Wb-Am
2)WbAm-2
48) Why/What for strapping in magnetron-----------------------------------------------------------------------------------to prevent mode jumping
49) Maximum attenuation for wave propagation is---------------------------------------------------------------------------dielectric 1)dielectric
2)conductor
50) In radio what beam is used by directional finder------------------------------------------------------------------------pencil beam 1)Omni directional
2)Pencil beam
51) Peroxide effect------------------------------------------------------------------------------------------------------------Free radical moment
52) At 25 degrees celcius Silicon barrier potentialis------------------------------------------------------------------------0.7 volts (1.12 eV)
