REGISTERED MASTER ELECTRICIAN Licensure Examination Friday, March 1, !"1" 1#"" $%m% & '#"" $m ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((( TEHCNICAL SUBJECTS
INSTR)CTI*N#Se+ect INSTR)CTI*N#Se+ect the correct anser -or each o- the -o++oin. -o++oin. /uestions% Mar0 on+y one anser -or each item y shadin. the ox corres$ondin. to the +etter o- your choice on the anser sheet $ro2ided% STRICTL3 N* ERAS)RES ALL*4ED% )se $enci+ No% 1 on+y% M)LTI5LE C6*ICE 1% A 7(2o+t +ead(ac +ead(acid id attery attery has an interna+ interna+ resista resistance nce o- "%"1 ohm% ohm% 6o much current current i++ i++ -+o i- the the attery attery has a short circuit8 a% 7"A % 7""a c% in-inity d% 9ero !% A inar inary y a++oy a++oy o- co$$ co$$er er and and 9inc% 9inc% a% :ron9e % :rass
c% A+nico
;% The resista resistance nce o- a conduct conductor or hen hen its tem$er tem$erature ature is is increased increased,, a% increases % remain constant c% 2aries
d% Stee+
d% decreases
<% A 2o+ta.e source o- !"= is a$$+ied across the termina+s termina+s o- a !%'(ohm rheostat% Ca+cu+ate the the $oer dissi$ated in the rheostat8 a% 17 1 7"4 % 1""4 c% 1'"4 d% 1>"4 '% )nit )nit oo- e+ect e+ectri rica+ ca+ $ressu $ressure re is a% att % am$ere
c% ohm
d% 2o+t
7% To resistor resistors s o- resistances resistances ' ohms ohms and ? ohms are connected connected in in series across across a 7"(2o+t 7"(2o+t source% source% 4hat is the $oer asored in the '(ohm resistor8 a% '" atts % !' atts c% 1!' atts d% 1"" atts ?% 4hen usin. usin. ohms ohms +a, +a, E di2ided di2ided y I ou+d ou+d so+2e so+2e -or -or a% atts % am$era.e c% 2o+ta.e
d% resistance
>% In resista resistance nce co+or co+or codin., codin., red co+or co+or is is assi.ned assi.ned to to a 2a+ue 2a+ue a% ; % " c% !
d% 1
% An e+ect e+ectri ric c iron iron ta0es ta0es ; @ am$s am$s%% I- the heatin heatin. . e+em e+emen entt has has a resi resist stanc ance e o- <" ohms, ohms, hat hat is its $oer $oer consum$tion8 a% "%<' 04 % "%< 04 c% "%;' 04 d% "%'1 04 1"% Another Another name -or -or a secondary secondary ce++% a% 4et ce++ % Stora.e ce++
c% Dry ce++
d% Dis$osa+e ce++
11% To resistances o- > and 1" ohms res$ecti2e+y res$ecti2e+y are connected in in $ara++e+ and ta0e a tota+ current o- A% 4hat is the current -+oin. in the >(ohm resistance8 a% ' A % < A c% 7 A d% ; A 1!% 4hat is the resistance resistance must e connected connected across a <(ohm resistor resistor in order to to .i2e an e/ui2a+ent resistance resistance o- ; ohms8 a% 1" ohms % > ohms c% 1! ohms d% None o- these 1;% 6o is 2o+tmeter connected in a circuit8 circuit8 a% Connect Connect in short short cir circui cuitt acros across s the the +oad +oad % Connect Connect in shunt shunt across across the +oad +oad c% Connect Connect in series series across across the +oad +oad d% Connect Connect in o$en o$en circui circuitt ith ith the the +oad +oad 1<% Com$onent o- an atom that that doesnt ha2e ha2e any e+ectrica+ e+ectrica+ char.e% a% E+ectron % 5roton c% Neutron
d% None o- these
1'% A +ead(acid ce++ is constructed in in mu+ti$+e -or the $ur$ose o- BBBBBB% a% increa increasi sin. n. the the em- o- the ce++ ce++ % increa increasi sin. n. the the ca$a ca$acit city y o- the ce++ ce++ c% increa increasi sin. n. the inte interna rna++ resist resistanc ance e o- the ce++ ce++ d% a++ o- these 17% A measurin. instrument instrument used to measure measure the diameter o- circu+ar ires ires in mi++s% a% Micrometer % Mi++imeter c% 4ire .au.e d% Mi++iammeter 1?% The e+ectron in the +ast +ast orit o- an atom are are ca++ed a% o ound e+ectrons % -r -ree e+ectrons
c% 2a 2a+ence e+ectrons
d% ch char.ed e+ectrons 5a.e
1
REGISTERED MASTER ELECTRICIAN Licensure Examination Friday, March 1, !"1" 1#"" $%m% & '#"" $m ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((( TEHCNICAL SUBJECTS
1>% A <"" MCM ca+e has ;? strands% 4hat is the diameter i- each strand in mi++s8 a% 1"%>1 % 1">1 c% 1"< d% 1"> 1% The co$$er -ie+d coi+s o- a motor as measured at !1oC and -ound to ha2e a resistance o- 7> ohms% A-ter the motor has run -or a .i2en time, the resistance is -ound to e " ohms% 4hat is the hot tem$erature o- the indin.8 a% 1"7%;7oC % 177%;"oC c% 1";%77oC d% None o- these !"% A secondary ce++ is char.ed ith a constant current o- 1" A -or 1" hours% 6o much char.e is accumu+ated8 a% 1"" cou+oms % ;7",""" cou+oms c% 1"",""" cou+oms d% 7",""" cou+oms !1% A ce++ hose em- is 1%<' = has an interna+ resistance o- < ohms% 4hat current i++ -+o i- this ce++ is connected across a 1 & ohms resistor8 a% "%< A % "%! A c% "%' A d% "%; A !!% 4hat is the diameter o- a co$$er ire ha2in. a cross sectiona+ area o- ;,7 CM8 a% 1%7 mm % ?%> mi++s c% "%7 inch d% None o- these !;% 4hen n e/ua+ resistors are connected in series to a source o- em- E 2o+ts, each ha2in. a resistance o- R ohms, hich o- the -o++oin. statements is true8 a% The 2o+ta.e dro$ across one o- the resistor is e/ua+ to En % The e/ui2a+ent resistance o- the circuit is e/ua+ to nR c% The current throu.h each o- the resistor is the same d% A++ o- these !<% Gi2e an exam$+e o- an e+ectrica+ conductor% a% :rass % Asestos
c% S+ate
d% Latex
!'% A sma++ +i.ht u+ ith a resistance o- 1""" ohms is connected across a 1!"(= +ine% 4hat is the current throu.h the u+8 a% 1%! A % "%1! A c% "%"1! A d% 1! A !7% 5ractica++y a++ atteries ha2e a nomina+ ratin. ased on the BBBB hour rate o- dischar.e% a% > % !< c% 17 d% 1! !?% The ener.y stored in an e+ectro+ytic ce++ is a% an e+ectrica+ % a ma.netic
c% a mechanica+
d% a chemica+
!>% The most common usa.e o- resistors in e+ectronic circuits is to BBBBBBBB% a% +imit a current % introduce a 2o+ta.e dro$ c% .enerate heat d% a++ o- these !% A !""(= +am$ has a hot resistance o- <"" ohms% The $oer ratin. in atts o- the +am$ is a% 1"" 4 % !"" 4 c% 7"" 4 d% !'" 4 ;"% A attery is char.ed at 1' A -or 1" hours% I- the char.in. 2o+ta.e is 1!" =, hat is the char.in. cost at 1%"" $er 04(hr8 a% 1' $esos % 1> $esos c% 1! $esos d% !" $esos 31.
6o much current is $roduced y a 7"(= source connected across a 1!(0Ω resistance8 a% ' A % ?%! A c% !" mA d% ' mA
;!% I- 1> resistances, each o- a 2a+ue o- ;7 ohms, are connected in $ara++e+, then the tota+ resistance is a% ;7 ohms % ! ohms c% 7<> ohms d% '< ohms ;;% A ire hose resistance is r ohms is ein. cut into -our e/ua+ $arts% I- these $arts are to e connected in $ara++e+, ho much is the e/ui2a+ent resistance in ohms8 a% r1! % r17 c% r> d% r< ;<% The resistance o- the materia+ in in2erse+y $ro$ortiona+ to its a% +en.th % tem$erature c% cross(sectiona+ area d% a++ o- these ;'% An ammeter is connected BBBBBB% a% across the +oad % in series ith the +oad c% in series($ara++e+ across the +oad d% none o- these 5a.e
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REGISTERED MASTER ELECTRICIAN Licensure Examination Friday, March 1, !"1" 1#"" $%m% & '#"" $m ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((( TEHCNICAL SUBJECTS
;7% I- the numer o- 2a+ence e+ectrons is exact+y -our, the materia+ is a% a conductor % a semi(conductor c% an insu+ator d% a su$erconductor ;?% Commercia+ unit o- an e+ectrica+ ener.y% a% ou+e % 4att(hour
c% Me.aatt
d% i+oatt(hour
;>% 4hat is the resistance that must e connected in $ara++e+ ith a 1%"(ohm resistance to .i2e an e/ui2a+ent resistance o- "%! ohm8 a% "%?' ohm % "%!' ohm c% 1%!" ohm d% "%'" ohm ;% 4hen a attery is dischar.ed in use, its 2o+ta.e is BBBBB the theoretica+ 2o+ta.e% a% >7%?; % 7 c% 7;%?> d% ?;%>7 <"% A ater heater ta0es !%' A at !;" =% 4hat is its hot resistance8 a% !" 4 % >" 4 c% '"" 4
d% !"" 4
<1% An e+ectric iron dras 1' A at !!" =% It is desired to reduced the current to 1! A y connectin. a series rheostat% 4hat is the resistance o- the rheostat8 a% ;%77 ohms % <%'' ohms c% '%1! ohms d% 1%>7 ohms
d% <
<<% Three 1!"(ohm resistor are connected in series($ara++e+% The e/ui2a+ent resistance o- the comination is BBBB% a% ;7" ohms % >" ohms c% 1>" ohms d% <" ohms <'% A !'(4 incandescent u+ rated at 1!" = and o$erated on a 1!" = +ine has urnt out and has to e re$+aced as soon as $ossi+e% There are se2era+ +am$s a2ai+a+e ut not o- the same ratin.% 4hich o- the u+s e+o shou+d e used to a$$roximate the $oer consum$tion o- the usted u+8 a% !" atts, 11" 2o+ts % 1"" atts, !<" 2o+ts c% '" atts, !<" 2o+ts d% ?' atts, !!" 2o+ts <7% A resistor o- ; ohms is connected in $ara++e+ ith one o- !(ohm resistance% I- the comination is connected in series ith a <(ohm resistor, hat is the e/ui2a+ent resistance o- the ho+e comination o- three resistors8 a% 7%< ohms % '%> ohms c% <%' ohms d% '%! ohms % A sustance that cannot e decom$osed any -urther y a chemica+ reaction% a% Ion % E+ement c% Mo+ecu+e d% None o- these <>% A resistance o- < "hms is connected in series to a $ara++e+ connection o- to >(ohm resistance% The tota+ resistance is a% 7 ohms % !" ohms c% > ohms d% 1! ohms <% *ne horse$oer is e/ui2a+ent to ho many atts8 a% ?<7 % ?7<
c% 7?<
d% None o- these
'"% A resistor o- <(ohm resistance is connected in $ara++e+ ith a series comination o- to resistors, ;(ohm and 1( ohm res$ecti2e+y% 4hat is the e/ui2a+ent resistance o- the ho+e comination8 a% > ohms % ; ohms c% ' ohms d% None o- these
END
S):MIT T6IS TEST )ESTI*N SET T*GET6ER 4IT6 T6E ANS4ER S6EET T* 3*)R 4ATC6ERS% :RINGING T6E TEST )ESTI*N SET *)T *F T6E R**M 4ILL :E A GR*)ND F*R DISCI5LINAR3 ACTI*N%
5a.e
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