1 What
kind of Volatge there exist in general? A. AC and DC B. Monophase and threephase.
C. Normal and reverse. D. High and low. ANSWER: A
2 he
!ond"!tivit# is the inverse of A. $mpedan!e. B. Cond"!tan!e. C. %esistivit#. D. %ea!tan!e. ANSWER: C
3 &ara
me'orar el fa!tor de poten!ia en "n !ir!"ito ind"!tivo( se ne!esita !one!tar) A. *n +an!o de transformadores. B. *n +an!o de !ondensadores. C. *n +an!o de +o+inas. D. *n +an!o de resisten!ias. ANSWER: B
4 What
r"les allow "s to remem+er the relationship +etween the dire!tion of the !"rrent A. ,en-s ,aw. B. %"le of the left hand. C. Corks!rew r"le. D. Biot / 0avarts ,aw. ANSWER: B
5 What
kinf of voltage !an not +e storage? A. AC. B. DC. C.%andom. D. n"ll.
ANSWER: A
6 1ind
power) 23 Volatge in volts $3 C"rrent in amperes %3 %esisten!e in ohms &3 &ower in watts A. & 3 24 5 % B. & 3 24 x % C. & 3 $4 x 2
D. & 3 %4 x 2 ANSWER: A
7 law ohm)
A. & 3 2 5 $ B. $ 3 2 x % C. % 3 2 5 $ D. & 3 % x $ ANSWER: C
8 What
is the !olor !ode for a 889 Ω :; resistor?
A. %ed( %ed( Brown( 6old. B. %ed( %ed( Bla!k( 0ilver. C. %ed( %ed( Bla!k( 6old. D. %ed( %ed( Brown( 0ilver. ANSWER: A
9 What
is the !olor !ode for a
A. Brown( %ed( Bla!k. B. Bla!k( %ed( Brown. C. %ed( Brown( Brown. D. Brown( Bla!k( %ed. ANSWER: D
10 What
is the !olor !ode for a <9k Ω ?
A. %ed( Brown( red. B. Brown( Bla!k( 7range. C. Bla!k( %ed( %ed. D. 7range( Bla!k( Brown. ANSWER: B
11 An
atoms atomi! n"m+er is determined +# the n"m+er of) A. Ne"trons min"s protons. B. &rotons. C. 2le!trons. D. Ne"trons. ANSWER: B
12 A
voltage will infl"en!e !"rrent onl# if the !ir!"it is) A. 7pen. B. $ns"lated. C. Closed. D. high resistense. ANSWER: C
13 he
+atter# s#m+ol is)
A.
B. C. D. ANSWER: B
14 &rimar#
+atteries( "nlike se!ondar# +atteries( ma# +e) A. Charged on!e. B. *sed on!e.
C. %e!harged over and over. D. 0tored indefinitel#. ANSWER: B
15 he
negative and positive !harge s#m+ols are assigned =in that order> to the
A. &roton and ele!tron B. 2le!tron and proton C. Atom and n"!le"s D. 2le!tron and element ANSWER: B
16 A
voltmeter is "sed A. o meas"re !"rrent. B. $n series with the !ir!"it. C. $n parallel with the !ir!"it. D. o meas"re !o"lom+s.
ANSWER: C
17 $f
the !"rrent in a !ir!"it e"als 9 A( it is likel# that the A. Voltage is too high. B. %esistan!e is too low. C. Cir!"it has a short. D. Cir!"it is open. ANSWER: D
18 C"rrent
e"als A. Co"lom+s 5 time B. Co"lom+s x time C. Voltage 5 time D. Voltage x time ANSWER: A
19 What
are the "nit and s#m+ol for !"rrent? A. Ampere( A. B. Ampere( A. C. Co"lom+( I. D. Ampere( A. ANSWER: D
20 Whi!h
part of an atom has no ele!tri!al !harge?
A. 2le!tron. B. Ne"tron. C. &roton. D. All of the a+ove. ANSWER: B
21 Whi!h
voltage so"r!e !onverts !hemi!al energ# to ele!tri!al energ#?
A. 2le!tri!al generator B. Batter# C. 0olar !ell D. 2le!troni! power s"ppl# ANSWER: B
22 Batteries
differ from f"el !ells in that A. A +atter# is a !losed s#stem. B. A +atter# "ses h#drogen and ox#gen to !reate ele!tri!it#. C. A +atter# "ses a pol#mer ele!trol#te mem+rane. D. none of the a+ove. ANSWER: A
23 An
ammeter is "sed to meas"re A. Voltage. B. %esistan!e. C. C"rrent. D. All of the a+ove. ANSWER: C
24 What
is a !hara!teristi! of a se!ondar# !ell?
A. %e!hargea+ilit#. B. Not re!hargea+le. C. A dr# !ell. D. Non@li"id ANSWER: A
25 C"rrent
is) A. he presen!e of a positive !harge. B. he a+"ndan!e of ele!trons.
C. he movement of ele!trons. D. he rep"lsion of ele!trons ANSWER: C
26 What
do #o" !all a diagram that shows the ele!tri!al !onne!tions of a !ir!"its !ompon A. A s!hemati! diagram. B. A pi!torial diagram. C. A +lo!k diagram. D. An ele!tri!al diagram. ANSWER: A
27 A
short !ir!"it will have) A. A small !"rrent flow. B. A large !"rrent flow. C. No !"rrent flow. D. 0ome !"rrent flow. ANSWER: B
28 he
+asi! differen!e +etween a f"se and a !ir!"it +reaker is A. a f"se is slower. B. a f"se is re"sa+le. C. a !ir!"it +reaker is re"sa+le. D. a !ir!"it +reaker is more relia+le. ANSWER: C
29 A
se!ondar# !ell generates d! via !hemi!al a!tivit# a primar# !ell generates d!) A. ele!tri!all#. B. opti!all#. C. thermall#. D. !hemi!all#. ANSWER: D
30 $n
the +elow fig"re the average load !"rrent is <: A. he rms val"e of transformer se!o
A. <: A B. <9.< A C. .: A D. <.< A
ANSWER: B
31 A
!#!lo!onverter !an +e A. step down. B. step "p. C. step down or step "p. D. none of the a+ove. ANSWER: C
32 Holding
!"rrent for an 0C% is +est des!ri+ed as A. the minim"m !"rrent re"ired for t"rn@off. B. he !"rrent re"ired +efore an 0C% will t"rn on. C. he amo"nt of !"rrent re"ired to maintain !ond"!tion. D. he gate !"rrent re"ired to maintain !ond"!tion. ANSWER: C
33 A
-ero@level dete!tor is a
A. Comparator with a sine@wave o"tp"t. B. Comparator with a trip point referen!ed to -ero. C. &eak dete!tor. D. ,imiter. ANSWER: B
34 A
digital@to@analog !onverter is an appli!ation of the A. 0!aling adder. B. Voltage@to@!"rrent !onverter. C. Noninverting amplifier. D. Ad'"sta+le +andwidth !ir!"it. ANSWER: A
35 he
o"tp"t voltage of a t#pi!al thermo!o"ple is A. ,ess than <99 Mv. B. 6reater than < V. C. hermo!o"ples var# resistan!e( not voltage. D. None of the a+ove. ANSWER: A
36 he
resistivit# of !opper is A. F.F Ω B. <9. Ω C. <. Ω D. <.9 Ω ANSWER: B
37 he
terminals of a power BE are !alled
A. emitter( +ase( !olle!tor. B. emitter( +ase( drain. C. so"r!e( +ase( drain. D. so"r!e( +ase( !olle!tor. ANSWER: A
38 $n
single phase half wave reg"lator( the average !"rrent over one f"ll !#!le A. is alwa#s positive. B. ma# +e positive or negative. C. ma# +e negative. D. is alwa#s negative. ANSWER: B
39 %esistan!e
limits the flow of !"rrent.
A. r"e. B. 1alse. ANSWER: A
40 he
terminals of a power M7012 are !alled A( emitter( +ase( !olle!tor. B. so"r!e( gate( drain. C. so"r!e( +ase( drain. D. emitter( gate( drain. ANSWER: C
41 A <8@volt
+atter# is delivering G amperes to a resistor. he power dissipated +# the resi
A. r"e. B. 1alse. ANSWER: B
42 A
!#!lo!onverter is A. a!@d! !onverter. B.d!@a! !onverter. C. d!@d! !onverter. D. a!@a! !onverter. ANSWER: D
43 A
digital voltmeter !an +e "sed to meas"re resistan!e. A. r"e. B. 1alse. ANSWER: A
44 A
rheostat is a two@terminal devi!e that !ontrols !"rrent A. r"e. B. 1alse.
ANSWER: A
45 A
s"rge voltage A. has ver# high magnit"de and ver# long d"ration. B. has ver# high magnit"de and ver# small d"ration. C. has ver# high magnit"de and ver# small d"ration and !an +e positive or negative. D. !an +e onl# positive. ANSWER: B
46 $n
thermal ohms law( temperat"re and power loss are analogo"s to A. V and $ respe!tivel# of ohms law. B. $ and V respe!tivel# of ohms law. C. % and V respe!tivel# of ohms law. D. $ and % respe!tivel# of ohms law. ANSWER: B
47 $f
the resistan!e in a !ir!"it with !onstant voltage in!reases( the !"rrent will
A. $n!rease. B. De!rease. C. 0ta# the same. D. Not eno"gh information. ANSWER: B
48 What
is the power in the given !ir!"it?
A. G. W B. G: W C. <: W D. 8: W ANSWER: B
49 What
is the kilowatt@ho"r !ons"mption of a 9 W lamp if it remains on for <:9 h? A. G.: B. G:9 C. 9 D. 9999 ANSWER: C
50 A
damaged resistor A. Ma# appear +"rned. B. Ma# have an in!reased resistan!e val"e. C. Ma# +e !he!ked with an ohmmeter. D. All of the a+ove. ANSWER: D
51 &ower
s"pplies differ from +atteries in that A. &ower s"ppl# o"tp"t voltages are a! and not d!. B. &ower s"ppl# voltages are not sta+le. C. &ower s"pplies are low@!"rrent devi!es. D. None of the a+ove. ANSWER: D
52 $f
voltage a!ross a resistan!e do"+les A. he !"rrent is halved. B. he resistan!e do"+les. C. he !"rrent is "n!hanged. D. None of the a+ove. ANSWER: D
53 What
is the power in the given !ir!"it?
A. G8 W B. 9 W C. :99 W D. < Iw ANSWER: A
54 7hms
law des!ri+es the mathemati!al relationship +etween A. 7hms( kilohms( and megohms. B. %esistor si-e and resistor val"e. C. %esistan!e( voltage( and !"rrent. D. None of the a+ove. ANSWER: C
55 2nerg#
is defined as the a+ilit# to
A. &rod"!e heat. B. &rod"!e light. C. &rod"!e so"nd. D. All of the a+ove. ANSWER: D
56 What
ele!tromotive for!e wo"ld !a"se 89 A of !"rrent to flow thro"gh a :99 J resistor A. 9.9 V B. 8.: V C. 8:.9 V D. <9(999 V ANSWER: D
57 he
rate at whi!h work is performed is !alled A. C"rrent. B. &ower. C. 2nerg#. D. Voltage. ANSWER: B
58 A
+atter#s !apa!it# to deliver power is meas"red in A. kWh B. Wh C. Ah D. Vh ANSWER: C
59 &ower
s"pplies are reg"lated to prevent the o"tp"t voltage from !hanging d"e to !hang A. ,ine voltage. B. 0"ppl# load. C. 1re"en!#. D. Both line voltage and s"ppl# load. ANSWER: D
60 $f
!"rrent thro"gh a resistan!e is halved A. he resistan!e is halved. B. he voltage is halved. C. he voltage do"+les. D. None of the a+ove. ANSWER: B
61 he
voltage drop a!ross a resistor is simpl# a differen!e of potential a!ross that resisto A. r"e. B. 1alse ANSWER: A
62 C"rrent
and voltage have a nonlinear relationship A. r"e. B. 1alse ANSWER: B
63 he
effi!ien!# rating of a power s"ppl# is determined +# internal power loss A. r"e. B. 1alse ANSWER: A
64 &ower
is a meas"re of how fast !"rrent is flowing. A. r"e. B. 1alse ANSWER: B
65 $s
a +etter wa# of expressing (:99(999 W.
A. .: Iw B. (:99 MW C. (:99 6W D. .: MW ANSWER: D
66 Whi!h
ele!tromagneti! devi!e "ses +r"shes and a !omm"tator? A. A speaker. B. A d! generator. C. A rela#. D. A solenoid ANSWER: B
67 What
are the effe!ts of moving a !losed wire loop thro"gh a magneti! field? A. A voltage is ind"!ed in the wire. B. A !"rrent is ind"!ed in the wire. C. he polarit# a!ross the wire depends on the dire!tion of motion. D. All of the a+ove. ANSWER: D
68 he
Hall effe!t. A.$s a phenomenon with no pra!ti!al appli!ations. B. $s "sed in vario"s sensor appli!ations. C. Can develop potentials of tho"sands of volts. D. $s the +asis for solar !ell operation. ANSWER: B
69 K0eriesK
and KparallelK as applied to d! motors refer to
A. he !onne!tion of the motor and !ontroller. B. he !onne!tion of the field !oil and armat"re windings. C. he !onne!tion of the +r"sh and !omm"tator. D. he !onne!tion of the motor +atteries. ANSWER: B
70 he
!omponent that prod"!es power in an ele!tromagneti! generator is !alled the A. Armat"re. B. 1ield winding. C. Comm"tator. D. Br"sh. ANSWER: A
71 A
Hall effe!t sensor A. 2xists onl# in theor#. B. $s a non!onta!ting magneti! sensor. C. Can operate onl# a few times +efore fail"re. D. &rod"!es ver# large voltages. ANSWER: B
72 Whi!h
ele!tromagneti! devi!e has a flexi+le !one? A. A speaker. B. A d! generator. C. A rela#. D. A solenoid. ANSWER: A
73 Whi!h
ele!tromagneti! devi!e has a mova+le iron !ore !alled a pl"nger? A. A speaker. B. A d! generator. C. A rela#. D. A solenoid. ANSWER: D
74 Whi!h
ele!tromagneti! devi!e !ontains an armat"re? A. A speaker. B. A d! generator. C. A rela#. D. A solenoid. ANSWER: B
75 he
polarit# of ind"!ed voltage while a field is !ollapsing is A. $ndependent of the for!e !reating the field. B.7opposite to the for!e !reating the field. C. $denti!al to the for!e !reating the field.
D. &resent onl# if the for!e is stationar#. ANSWER: B
76 he
a+ilit# of a material to maintain a magneti-ed state =witho"t the presen!e of a mag
A. r"e. B. 1alse. ANSWER: A
77 he
Hall voltage is the voltage !reated +# a !ond"!tor moving thro"gh a magneti! fiel A. r"e. B. 1alse. ANSWER: B
78 he
a+ilit# of a material to maintain a magneti-ed state =witho"t the presen!e of a mag A. r"e. B. 1alse. ANSWER: B
79 he
operation of an ele!tri!al generator relies on ele!tromagneti! ind"!tion. A. r"e. B. 1alse. ANSWER: A
80 When
does maxim"m power transfer happen from the so"r!e to the load? A. When the so"r!e resistan!e is greater than the load resistan!e. B. When the so"r!e resistan!e is less than the load resistan!e. C. When there is negligi+le so"r!e resistan!e. D. When the so"r!e resistan!e e"als the load resistan!e. ANSWER: D
81 A
transformer is pl"gged into a <89 V rms so"r!e and has a primar# !"rrent of G99 mA A. ; B. F8; C. F9; D. F:; ANSWER: C
82 $n!reasing
the n"m+er of t"rns of wire on the se!ondar# of a transformer will A. $n!rease the se!ondar# !"rrent. B. De!rease the se!ondar# !"rrent. C.Have no effe!t on the se!ondar# !"rrent. D. $n!rease the primar# !"rrent. ANSWER: B
83 What
is the se!ondar# voltage in the given !ir!"it?
A.
84 A transformer has
A. &rimar# and se!ondar# windings( +oth of whi!h are !onsidered inp"ts. B. &rimar# and se!ondar# windings( +oth of whi!h are !onsidered o"tp"ts. C. A primar# winding "sed as an o"tp"t and a se!ondar# winding "sed as an inp"t. D. A primar# winding "sed as an inp"t and a se!ondar# winding "sed as an o"tp"t. ANSWER: D
85 $f
the primar# power of an ideal transformer having a 8)< voltage ratio is <99 W( the se A. <99 W B. :9 W C. : W D. 899 W ANSWER: A
86 6ood ins"lators)
A. Have few ele!trons in their o"ter shells. B. Have a large diele!tri! strength. C. Have a small +reakdown voltage. D. Have man# ele!trons in the n"!le"s. ANSWER: B
87 he
"nit designator for resistan!e val"e is the) A. Ampere. B. Volt. C. 7hm. D. Watt. ANSWER: C
88 %esistan!e
in a !ir!"it is) A. 7pposition to !"rrent. B. 7pposition to voltage.
C. he same as !"rrent. D. he same as voltage. ANSWER: A
89 How
is power dissipated in a resistor? A. B# resistan!e. B. B# voltage. C. B# !"rrent. D. B# heat. ANSWER: D
90 Wirewo"nd
resistors are "s"all# "sed in !ir!"its that have) A. High !"rrent. B. Negative temperat"re !oeffi!ients. C. ,ow power. D. High voltage. ANSWER: A
91 A
GG k Ω resistor with a 89; toleran!e !he!ks o"t as ok with whi!h of the following o
A. 899 ohms B. 8<G ohms C. 99 ohms D. GFF9 ohms ANSWER: A
92 A
good f"se will have) A. Lero ohms resistan!e. B. A medi"m resistan!e. C. A high resistan!e. D. An infinite resistan!e. ANSWER: A
93 he
word work means that) A. 2nerg# has +een transferred. B. $t is inversel# related to energ#. C. Nno energ# has +een transferred. D. Work and energ# are not related. ANSWER: A
94 %esistan!e
is) A. he opposition to !"rrent flow a!!ompanied +# the dissipation of heat. B. 0#m+oli-ed +# %( meas"red in ohms( and dire!tl# proportional to !ond"!tan!e. C. Dire!tl# proportional to !"rrent and voltage. D. %epresented +# the flow of fl"id in the fl"id !ir!"it. ANSWER: A
95 %esistors
are identified as to wattage +#)
A. 0i-e. B. Color !ode. C. #pes of materials. D. $nternal !onstr"!tion. ANSWER: A
96 %esistor
toleran!e is either printed on the !omponent( or is provided +#) A. Ie#ed !ontainers. B. 0i-e. C. Color !ode. D. 7hmmeter reading. ANSWER: C
97 How
man# +asi! t#pes of resistors exist?
A. < B. 8 C. G D. ANSWER: B
98 With
a !omplex !ir!"it( a s"ppl# so"r!e senses) A. 7pen !ir!"it !omponents. B. When voltages need to +e in!reased. C. 7nl# a single resistive !onne!tion. D. When !omplex !"rrents are needed. ANSWER: C
99 Whi!h
is the most important step "tili-ed when meas"ring resistors? A. *se the highest possi+le s!ale. B. Ieep test leads short. C. Lero the meter +efore "sing. D. %emove power from the !ir!"it. ANSWER: D
100 Components
designed to oppose the flow of !"rrent are !alled) A. $ns"lators. B. Cond"!tors. C. %esistors. D. Heat ex!hangers. ANSWER: C
101 7ne
pro+lem with me!hani!all# varia+le resistors is noti!ea+le in a"dio !ir!"its as) A. 0!rat!h# noise.
B. ,a!k of +ass response. C. Varia+le vol"me. D. oo m"!h tre+le response. ANSWER: A
102 A
!olor !ode of orange( orange( orange is for what ohmi! val"e? A. 88 kilohms. B. GG99 ohms. C. 999 ohms. D. GG kilohms. ANSWER: D
103 What
is the most !ommonl# "sed !ond"!tor in ele!troni!s?
A. Al"min"m. B. Copper. C. 6old. D. 0ilver. ANSWER: B
104 A
potentiometer has how man# leads? A. < B. 8 C. G D. ANSWER: C
105 he
six +asi! forms of energ# are) A. ,ight( s"n( magneti!( !hemi!al( ele!tri!al( and me!hani!al. B. 2le!tri!al( me!hani!al( light( heat( magneti!( and !hemi!al. C. 2le!tri!al( me!hani!al( s"n( heat( !hemi!al( and light. D. &otential( s"n( light( !hemi!al( ele!tri!al( and me!hani!al. ANSWER: B
106 &ower
is defined as) A. he rate at whi!h energ# is "sed. B. Watts. C. 2nerg#. D. he rate at whi!h energ# is generated. ANSWER: A
107 What
resistor t#pe is fo"nd in 0$&s and D$&s? A. Metal film. B. Wirewo"nd. C. Metal oxide. D. hi!k film.
ANSWER: D
108 How
man# !onne!tions does a potentiometer have?
A. < B. 8 C. G D. ANSWER: C AC 109 $n
+oth ind"!tion and s#n!hrono"s a! motors A. he operating speed is ver# stead#. B. he stator magneti! field is stationar#. C. he stator magneti! field rotates. D. he Ks"irrel !ageK forms the rotor. ANSWER: C
110 Most
pra!ti!al alternators generate ele!tri!it# from
A. A !oil rotating within a magneti! field. B. A magneti! field rotating aro"nd fixed windings. C. A permanent magnet rotating within a var#ing ele!tromagneti! field. D. None of the a+ove. ANSWER: B
111 A
half@!#!le average voltage of <8 V is e"al to what rms voltage? A.
112 What
is the instantaneo"s peak voltage at 8:9 on a V peak sine wave? A. :. V B. /:. V C. 8.
113 A
re!tang"lar wave that has a d"t# !#!le of :9; !o"ld +e !alled a A. K!K wave. B. 0awtooth wave. C. 0"are wave. D. riang"lar wave. ANSWER: C
114 he
effe!tive val"e of a sine wave is e"al to
A. 9.9 of peak voltage. B. 9.G of peak voltage. C. 0in : of peak voltage. D. Both 9.9 of peak voltage and sin : of peak voltage. ANSWER: D
115 A
single@phase ind"!tion motor A. $s self@starting. B. 7perates at a fixed speed. C. $s less relia+le than a three@phase s#n!hrono"s motor. D. None of the a+ove. ANSWER: D
116 What is
the average voltage when a re!tang"lar waves +ase line voltage is 89 V( its pe
A. 8 V B. G9 V C. 9 V D. : V ANSWER: B
117 All periodic frequencies are derived by combining higher frequency sine waves called
A. r"e B. 1alse ANSWER: A
118 What
are the two main appli!ations for a!? A. Dire!t( p"lsating. B. 2le!tri!( magneti!. C. &ower( information D. 0tati!( d#nami!. ANSWER: C
119 he
distan!e that a signals energ# !an travel in the time it takes for one !#!le to o!!"r A. Amplit"de. B. 1re"en!#. C. Wavelength. D. &eriod. ANSWER: C
120 $f
!"rrent varies periodi!all# from -ero to a maxim"m( +a!k to -ero( and then repeats( t A. Dire!t. B. Alternating. C. &"lsating. D. %epetitive. ANSWER: C
121 What
voltage will an a! voltmeter displa#? A. %M0. B. Average. C. &eak. D. &eak@to@pe ANSWER: A
122 What
is the peak val"e of a ho"sehold applian!e that "ses a 8G9 V a! so"r!e? A.<G V B. 8G9 V C. G8: V D. 9 V ANSWER: C
123 What
is the waveform period differen!e +etween the 9 H- ele!tri!it# "sed in this !o"n A. G ms B. < ms C. ms D. 89 ms ANSWER: A
124 est
e"ipment sele!tion ena+les the te!hni!ian to +oth generate signals and) A. Change !ir!"it !onditions B. $n'e!t signals. C. 0ense !ir!"it !onditions. D. Change signal fre"en!ies. ANSWER: C
125 Wh#
is a! !"rrent transfer more effe!tive than d! !"rrent transfer over long distan!es? A. D"e to the height of power lines. B. D"e to the "se of a! generators. C. D"e to step@"p and step@down transformers red"!ing $ ²% losses. D. D"e to ver# high voltages. ANSWER: C
126 A
sine wave rea!hes maxim"m positive voltage at) A. F9 B. 9 D. /F9 D. G9 ANSWER: A
127 &ower
!ompanies s"ppl# a!( not d!( +e!a"se) A. $t is easier to transmit a!.
B. there is no longer a need f or d!. C. d! is more dangero"s. D. here are not eno"gh +atteries. ANSWER: A
128 $f
a waveform period is determined to +e <9 mi!rose!onds in d"ration( what is the fre A. <99 HB. <999 HC. <9 kHD. <99 kHANSWER: D
129 AC
effe!tive voltage is named)
A. Average. B. &eak. C. &eak@to@peak. D. %oot mean s"are. ANSWER: D
130 he
power that is distri+"ted from a power plant to #o"r home is) A. High voltage to high voltage. B. ,ow voltage to high voltage. C. High voltage to low voltage. D. ,ow voltage to low voltage. ANSWER: C
131 A
triangle wave !onsists of repeating) A. &ositive ramps onl#. B. Negative ramps onl#. C. &ositive and negative ramps of e"al val"e. D. &ositive and negative ramps of "ne"al val"e. ANSWER: C
132 What
is the name of a devi!e "sed to dire!tl# meas"re the fre"en!# of a periodi! wave A. 7s!illos!ope. B. 1re"en!# meter or !o"nter. C. A"dio fre"en!# generator. D. %adio fre"en!# generator. ANSWER: B
133 What
is the name of a devi!e that !onverts so"nd waves to ele!tri!al waves? A. An amplifier. B. An antenna. C. A filter. D. A mi!rophone.
ANSWER: D
134 What
is the peak@to@peak !"rrent val"e when an ammeter meas"res a 89 mA val"e? A. < mA B. 8 mA C. 9 mA D. : mA ANSWER: D
135 A
sine wave has) A. 1o"r "adrants. B. wo alternations. C. 7ne period. D. All of the a+ove. ANSWER: D
136 What
is the peak@to peak voltage of a : Vrms a! voltage?
A. <: V B. < V C. 8 V D. F V ANSWER: A
137 What
is the period of a < MH- sine wave? A.
138 Derived
"nits are o+tained from vario"s !om+inations of A. 2le!tri!al "antities. B. 1"ndamental "nits. C. Metri! prefixes. D. $nternational standards. ANSWER: B
139 Whi!h
of the following metri! prefixes !o"ld repla!e <9 ⁻⁹?
A. Nano. B. Mega. C. Iilo. D. Mi!ro. ANSWER: A
140 899
mV is the same as
A. .8 OV B. .8 V C. (899(999 V D. 9.998 OV ANSWER: B
141 he
differen!e +etween s!ientifi! and engineering notation is A. &owers of ten representation. B. 0ingle vs. m"ltiple digits +efore de!imal point. C. 6ro"pings of m"ltiples of three digits. D. All of the a+ove. ANSWER: D
142 he
"nit for fre"en!# is the A. Hert-. B. Ampere. C. Watt. D. 0e!ond. ANSWER: A
143 &i!o
is what relation to mi!ro? A . 7ne@tenth. B. 7ne@h"ndredth. C. 7ne@tho"sandth. D. 7ne@millionth. ANSWER: D
144 When
parallel resistors are of three different val"es( whi!h has the greatest power loss? A. he smallest resistan!e. B. he largest resistan!e. C. he# have the same power loss. D. Voltage and resistan!e val"es are needed. ANSWER: A
145 he
voltage a!ross an# +ran!h of a parallel !ir!"it) A. Varies as the total !"rrent varies. B. $s inversel# proportional to total !ir!"it resistan!e. C. $s e"all# applied to all +ran!h !ond"!tan!es. D. $s dropped in proportion to ea!h +ran!h resistan!e. ANSWER: C
146 What
happens to total resistan!e in a !ir!"it with parallel resistors if one of them opens A. $t in!reases. B. $t halves. C. $t remains the same.
D. $t de!reases. ANSWER: A
147 Components
that !onne!t in parallel form)
A. Bran!hes. B. 7pen !ir!"its. C. 0hort !ir!"its. C. A voltage divider. ANSWER: A
148 A
parallel !ir!"it differs from a series !ir!"it in that a parallel !ir!"it has) A. No path for !"rrent flow. B. 1ewer paths for !"rrent flow. C. 7ne path for !"rrent flow. D. More than one path for !"rrent flow. ANSWER: D
149 $f
two parallel@!onne!ted resistors dissipate watts and <9 watts of power( then what i A. G.: watts B. watts C. < watts D. 9 watts ANSWER: C
150 What
does ,2D stand for? A. ,ight 2mitting Displa#. B. ,ow 2nerg# Displa#. C. ,ight 2mitting Diode. D. ,ight 2mitting Dete!tor. ANSWER: C
151 Conne!ting
a lead from the negative to the positive of a +atter# will prod"!e) A. A high resistan!e !ir!"it. B. A short !ir!"it. C. A low !"rrent path. D. An open !ir!"it. ANSWER: B
152 What
is the approximate !hara!teristi! voltage that develops a!ross a red ,2D? A. <.v B. G.v C. 9.v D. :v ANSWER: A
153 Whi!h
is not a K!ommonK val"e of resistan!e)
A. 8k B.
154 A
<9k resistor in parallel with <9k prod"!es)
A. <9k B. :k C. 89k D. Cannot +e determined. ANSWER: B
155
resistors in as!ending order are)
A. 88% 89k 8k8
156 o
o+tain a higher val"e of resistan!e( resistors are !onne!ted in) A. %everse. B. 1orward. C. &arallel. D. 0eries. ANSWER: D
157 What
is <(999p? A. 9.9
158 he
!"rrent in a !ir!"it is :mA. his is)
A. 9.9:Amp B. 9.999:A C. 9.99:A D. 9.:A ANSWER: A
159
is e"al to) A. 9.99
C. 9.9
160 A
DC voltage) A. %ises and falls. B. $s a sinewave. C. %emains !onstant. D. $s an a"dio waveform. ANSWER: C
161 he
toleran!e +ands) gold silver +rown( represent) A. <9;( :;( <; B. :;( <9;( 8; C. :;( <9;( <; D. <9;( :;( 8; ANSWER: C
162 Arrange
these in as!ending order) n( p( " A. p( "( n B. n( "( p C. p( n( " ANSWER: C
163 he
n"m+er K<9K on a !apa!itor indi!ates) A. 9.<" B. <99n C.
164 A path
+etween two or more points along whi!h an ele!tri!al !"rrent !an +e !arried is !
A. Network. B. Relay. C. Circuit. D. Loop. ANSWER: C
165 he
fre"en!# of the se!ond harmoni! of 9 H- is) A. G9 H-. B. 9 H-. C. <89 H-. D. <9 H-. ANSWER: C
166 What
is the approximate peak@to@peak voltage of a 8 V%M0 sine wave? A. 8V B. 8.V C. V D. :.V ANSWER: D
167 he
form"la for ele!tri!al !"rrent is)
A. Voltage 5 %esistan!e. B. %esistan!e P Voltage. C. Voltage %esistan!e. D. %esistan!e 5 Voltage. ANSWER: A
168 2xpress
<5: as a de!imal n"m+er.
A. 9.<:. B. 9.8. C. 9.8:. D. 9.:. ANSWER: B
169 $t
takes G9 min"tes to !omplete a rea!tion at <:9 I. Whi!h of the following is an estim A. ,ess than <: min"tes. B. <: Min"tes. C. 9 Min"tes. D. More than 9 min"tes. ANSWER: A
170 2nerg#
is the !apa+ilit# or a+ilit# to) A. Do work. B. Ca"se gravit#. C. Destro# !harge. D. $n!rease time. ANSWER: A
171 Compared
to an effe!tive voltage of <89 VAC( the average heat energ# o"t of a resistor
A. r"e B. 1alse ANSWER: A
172 What
are the !hara!teristi!s of a !oaxial !a+le? A. $t has twisted pairs with a shield. B. $t has a !enter !ond"!tor !overed with an ins"lator( then +raided or solid o"ter !ond C. $t has heavier ins"lation than most !a+les. D. $t is v"lnera+le to high fre"en!# interferen!e.
ANSWER: B
173 What
is the Qpower fa!torR? A. %atio of tr"e power to apparent power. B. Beak power times .9 C. 0in of the phase differen!e +etween 2 and $. D. Cos of the phase angle +etween tr"e power and apparent power. ANSWER: A
174 A
power s#stem is providing 899 VAC at 8: A. he phase angle +etween !"rrent and A. 8(<
175 Whi!h
of the following is one of the f"n!tions performed +# a diode?
A. 1ilter. B. Amplifier. C. %e!tifier. D. $nverter. ANSWER: C
176 What
is the peak voltage of a sine wave that meas"res 889 VAC rms? A. <:: V B. <F V C. G<< V D. 9 V ANSWER: C
177 As
the effi!ien!# of a devi!e D2C%2A020( whi!h of the following will $NC%2A02? A. &ower o"tp"t. B. Amplifier gain. C. Heat o"tp"t. D. 7"tp"t impedan!e. ANSWER: C
178 he
fre"en!# of a signal is $NV2%02,S proportional to whi!h of the following) A. &eriod. B. Amplit"de. C. &hase. D. &ower. ANSWER: A
179 7ne
!o"lom+@per@se!ond is e"al to one)
A. Watt. B. Eo"le. C. Volt. D. Ampere. ANSWER: D
180 Whi!h
of the following is represented +# the s#m+ol T,? A. $mpedan!e of a load. B. %ea!tan!e of a !oil. C. %esonant fre"en!# of a filter. C. 7"tp"t level of a so"r!e. ANSWER: B
181 What
is IVA? A. Apparent power. B. Iilo Vatios. C. Iilo Volt. D. &ower. ANSWER: A
182 What
is A0? A. A"tonomo"s transferen!e so"r!e. B. ,ang"age of programing. C. A"tomati! transfer swit!h. D. A"tomati! swit!h s"ppl#. ANSWER: C
183 What is AC?
A. Alternating C"rrent. B. Aleator# !"rrent. C. After !"rrent. D. Alwa#s !"rrent. ANSWER: A
184 What
is the s#m+ol Ω ?
A. 7hm. B. Volt. C. $nfinit# D. *ndeterminate. ANSWER: A
185 What
is *&0? A. *ninterr"pti+le power so"r!e. B. *ninterr"pti+le power s"ppl#. C. *nsta+le power s"ppl#.
D. *ninterr"pti+le power swit!h. ANSWER: C
186 $f
we meas"re the !"rrent flowing thro"gh a !ir!"it( How to !onne!t the ammeter in th
A. $n series. B. $n parallel. C. $n mixed. D. Nothing of the a+ove. ANSWER: A
187 Whi!h
resistive !omponent is designed to +e temperat"re sensitive? A. hermistor. B. %heostat. C. &otentiometer. D. &hoto!ond"!tive !ell. ANSWER: B
188 $n
pra!ti!al appli!ations( +atter# voltage) A. $s restored as soon as dis!onne!t o!!"rs. B. $s lowered as the load in!reases. C. Ma# +e stored indefinitel#. D. Will +e red"!ed to -ero as power is drawn. ANSWER:
189 An
example of potential energ# is) A. tea@kettle steam. A. A moving vehi!le. B. the s"n. D. A +atter#. ANSWER: D
190 When
!onsidering !onventional !"rrent vers"s ele!tron !"rrent flow) A. 2le!tron !"rrent flow !ame first. B. &rotons move in !onventional !"rrent flow. C. Conventional !"rrent flow !ame first. D. he dire!tion of !"rrent is the same in +oth methods. ANSWER: C
191 A
swit!h is a devi!e that) A. 0hort !ir!"its !omplex !ir!"its. B. Holds a f"se. C. Has do"+le poles. D. 7pens or !ompletes a !"rrent path. ANSWER: D
192 he
term "sed to designate ele!tri!al press"re is) A. Voltage. B. C"rrent. C. %esisten!e. D. Cond"!tan!e. ANSWER: A
193 C"rrent
is !onsidered as the movement of)
A. 2le!trons. B. &rotons. C. Charge. D. n"!lei. ANSWER: A
194 A
lead@a!id +atter# is an example of a
A. 0olar !ell. B. 1"el !ell. C. &rimar# +atter#. D. 0e!ondar# +atter#. ANSWER: D
195 A
+asi! ele!tri! !ir!"it is made "p of what !omponents? A. A load( a resistor( and a !ond"!tive path for !"rrent. B. A voltage so"r!e( a load( and a !ond"!tive path for !"rrent. C. A voltage so"r!e( a !ond"!tive path for !"rrent( and a +atter#. D. A !ond"!tive path for !"rrent( a +atter#( and a !opper wire. ANSWER: B
196 What
is the name of the press"re that moves ele!trons in a !losed !ir!"it? A. Amperes. B. 7hms. C. Voltage. D. Co"lom+s. ANSWER: C
197 $f
a fl"id s#stem is !ompared to an ele!tri!al s#stem( the fl"id p"mp will !orrespond to
A. Cond"!tor. B. ,amp. C. Batter#. D. $ns"lator. ANSWER: C
198 Whi!h
of the following statements is tr"e? A. *nlike !harges repel and like !harges attra!t. B. ,ike !harges repel and "nlike !harges attra!t.
C. *nlike !harges attra!t and like !harges attra!t. D. ,ike !harges repel and "nlike !harges repel. ANSWER: B
199 he
amo"nt of diele!tri! heating is inversel# proportional to fre"en!#. A. r"e. B. 1alse. ANSWER:
200 h#ristors
are s"ita+le for d! !ir!"it +reakers +"t not for a! !ir!"it +reakers.
A. r"e. B. 1alse. ANSWER:
nd the magneti! field dire!tion?
nts?
ndar# !"rrent is
stor is watts.
?
es in the
.
eti-ing for!e> is !alled retentivit#.
.
eti-ing for!e> is !alled h#steresis.
rms. he se!ondar# is providing < V a!ross a <9 omega.gif load. What is the effi!ien!# of the transf
!ondar# power is
mmeter readings?
k@to@peak voltage is :9 V( and its d"t# !#!le is 89;?
harmonics.
s !alled the signals)
e signal is)
tr# and the :9 H- "sed in 2"rope?
en!# of the signal?
?
?
the total power loss?
alled a)
ate of the time re"ired to !omplete the same rea!tion at G99I?
is the same for a voltage of <89 VDC.
!tor and then ins"lation.
oltage is 8:. What is the tr"e power "sed +# the s#stem?
!ir!"it?
a)
rmer?
