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 7(2o+t +ead(acid attery attery has an interna+ interna+ resistance o- "%"1 ohm% 6o 6o much current i++ -+o i- the attery attery has a short circuit8 a% 7"A b. 600A c% in-inity d% 9ero !% A inary inary a++oy a++oy oo- co$$e co$$err and and 9inc% 9inc% a% :ron9e b. Brass
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 is a$$+ied across across the termina+s termina+s o- a !%'(ohm rheostat% rheostat% Ca+cu+ate Ca+cu+ate the $oer dissi$ated in the rheostat8 a% 160W % 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. volt
7% To To resistors resistors o- resistanc resistances es ' ohms and ? ohms are connected connected in in series across across a 7"(2o+t 7"(2o+t source% 4hat 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 di2i di2ided ded 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 assi.ne assi.ned d to a 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 stan ance ce o- <" ohms, ohms, hat hat is its its $oe $oer r consum$tion8 a% "%<' 04 b. 0.#$ %W c% "%;' 04 d% "%'1 04 1"% Another Another name -or a secondar secondary y ce++% a% 4et ce++ b. Stora&e cell
c% Dry ce++
d% Dis$osa+e ce++
11% 11% To To resistances o- > and 1" ohms res$ecti2e+y are connected 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 must e connected connected across a <(ohm resistor in order to .i2e .i2e an e/ui2a+ent resistance o- ; ohms8 a% 1" ohms % > ohms c. 1 o'(s d% None o- these these 1;% 6o is 2o+tmeter connected in a 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. Co Conn nnect ect in seri series es acros across s t'e t'e load load d% Connect Connect in o$en o$en circui circuitt ith ith the +oad +oad 1<% Com$onent o- an atom that doesnt ha2e any e+ectrica+ char.e% char.e% a% E+ectron % 5roton c. Ne)tron
d% None o- these these
1'% A +ead(acid +ead(acid ce++ is constructed constructed in mu+ti$+e mu+ti$+e -or the $ur$ose $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. all o* o* t' t'ese 17% A measurin. measurin. instrument used to measure the diameter diameter o- circu+ar ires ires in mi++s% a% Micrometer % Mi++imeter c. Wire &a)&e d% Mi++iammeter 1?% The e+ectron in the +ast +ast orit o- an atom are are ca++ed a% ound e+e e+ectrons % -ree e+ectrons
c. valence electrons
d% 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. 10# 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* t'ese !"% A secondary ce++ is char.ed ith a constant current o- 1" A -or 1" hours% 6o much char.e is accumu+ated8 a. 100 co)lo(bs % ;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. 0.+ 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* t'ese !;% 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. All o* t'ese !<% Gi2e an exam$+e o- an e+ectrica+ conductor% a. Brass % 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 b. 0.1 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% > b. # 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 c'e(ical
!>% The most common usa.e o- resistors in e+ectronic circuits is to BBBBBBBB% a. li(it a c)rrent % 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. 100 W % !"" 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 b. 1, -esos c% 1! $esos d% !" $esos ;1% 6o much current is $roduced y a 7"(= source connected across a 1!(0Ω resistance8 a% ' A % ?%! A c% !" mA d. ! (A ;!% I- 1> resistances, each o- a 2a+ue o- ;7 ohms, are connected in $ara++e+, then the tota+ resistance is a% ;7 ohms b. o'(s 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/sectional area
d% a++ o- these
;'% An ammeter is connected BBBBBB% a. across t'e load % in series ith the +oad c% in series($ara++e+ across the +oad d% none o- these 5a.e
!
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 cond)ctor b. a se(i/cond)ctor c. an ins)lator d% a su$erconductor ;?% Commercia+ unit o- an e+ectrica+ ener.y% a% ou+e % 4att(hour
c% Me.aatt
d. ilo"att/'o)r
;>% 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 d% "%'" ohm c. 1.0 o'( ;% 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. !00 W
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. +.66 o'(s % <%'' 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 b. ,0 o'(s 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. 0 "atts 110 volts % 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. !. o'(s % A resistance o- < "hms is connected in series to a $ara++e+ connection o- to >(ohm resistance% The tota+ resistance is a% 7 ohms % !" ohms c. , o'(s d% 1! ohms <% *ne horse$oer is e/ui2a+ent to ho many atts8 a. 2#6 % ?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* t'ese
END
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5a.e
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