HVAC Excellence - ELECTRICITY Exam
Questions And Answers With Correct
Update
Current rflow ris: r- rAnswer r- rThe rflow rof relectrons rin rthe rcircuit.
Impedance ris: r- rAnswer r- rOpposition rto ralternating rcurrent rflow.
Like rcharges; r- rAnswer r- rrepel reach rother.
Any rmaterial rthat rwill rreadily rrelease relectrons ris rcalled; r- rAnswer r- rA rconductor
The rsymbol rfor rcurrent ris; r- rAnswer r- rI
Which rof rthe rfollowing rmaterials rwould rbe rbest rsuited rfor ruse ras ra rsemi-conductor? r- rAnswer r- rsilicon
The rsafety rground rconductor ris rusually rcolor rcoded; r- rAnswer r- rgreen ror rbare.
An relectron rhas; r- rAnswer r- ra rnegative rcharge.
Resistance ris: r- rAnswer r- rOpposition rto rcurrent rflow.
How rmany rwatts rof rpower rare rused rby ra rheater roperating rat r240 rvolts rand rdrawing r5 ramps? r- rAnswer r-
r1200 rwatts
Which rof rthe rfollowing rmeters rmust ruse rits rinternal rpower rto rcheck ra rload ror rcircuit? r- rAnswer r-
rOhmmeter
In relectrical rwiring, ra rblack rcolored rwire rin ran ralternating rcurrent rcircuit rusually rindicates; r- rAnswer r-
rthe rhot rconductor.
Fuses rare rsized rby: r- rAnswer r- rVolts r& rAmps
What rwould rbe rthe rresult, rif ra r24 rvolt, r20-ohm rlow rvoltage rconta rctor rcoil rwere rwired rin rseries rwith ra
r24 rvolt, r200-ohm rcontrol rrelay rcoil? r- rAnswer r- rOnly rthe rcontrol rrelay rwould roperate.
Three rdefrost rheaters, reach r15 rohms rare rwired rin rparallel rto ra r120 rvolt rpower rsupply. rHow rmany rwatts
rof rpower rwill rbe rused? r- rAnswer r- r2880 rWatts
Which rof rthe rfollowing ris rgenerally rconsidered rto rbe rwithin rthe rmaximum rallowable r(plus ror rminus)
rsupply rvoltage rvariation? r- rAnswer r- r5%
Capacitors rare rrated rin r- rAnswer r- rMicrofarads r& rVolts.
When rtesting ra rcapacitor rwith ran ranalog ror rdigital rohmmeter, rthe rmeter rshould; r- rAnswer r- rmeasure
rlow rresistance rthen rreturn rto rhigh rreading.
, What ris rthe rterm rused rto rdescribe rthe routput rside rof ra rtransformer? r- rAnswer r- rSecondary rside.
One rhorsepower ris requal rto r__________ rwatts. r- rAnswer r- r746
How rmuch rresistance rmust rbe rplaced rin ra r120 rvolt rcircuit rin rorder rto rlimit rthe rcurrent rto r2 ramps? r-
rAnswer r- r60 rOhms
A rparallel rcircuit rcontains ra r18 rohm rand ra r9 rohm rresistor. rThe rtotal rresistance requals; r- rAnswer r- r6
rohms.
In ra rseries rcircuit, rthe rvoltage rdrop racross reach rresistance r(load) rwill. r- rAnswer r- radd rup rto requal rthe
rsource rvoltage.
The rtotal rresistance rof ra rparallel rcircuit rwill rbe; r- rAnswer r- rless rthan rthe rsmallest rresistance.
Which rof rthe rfollowing rstatements rabout rcurrent ris rtrue? r- rAnswer r- rCurrent rflow rwill rincrease rwhen
rvoltage rincreases.
When rresistors rare rwired rin rparallel; r- rAnswer r- rthe rvoltage rdrop racross reach rresistor rwill rbe rthe rsame
ras rthe rapplied rsource
Which rof rthe rfollowing ris requal rto r2.1KW? r- rAnswer r- r2,100 rWatts
Which rof rthe rfollowing ris requal rto r100 rmilliamps? r- rAnswer r- r0.10 ramperes
A rcapacitor ranalyzer ris rdesigned rto rread; r- rAnswer r- rthe rcapacitive rresistance rof ra rcapacitor.
On ran relectronic roil rsafety rswitch rwhat rchanges rthe rpressure rsingal rto relectrical rsignal? r- rAnswer r-
rTransducer.
The relectric rmeter ron ra rhouse rmeasures rthe r______________ rpassing rth rrough rit. r- rAnswer r- rwattage
A rthree rphase rload rrequires ra rminimum rof; r- rAnswer r- rthree rsupply rlines.
Which rof rthe rfollowing ris rthe rcorrect rformula rfor rdetermining rwattage rin ran relectrical rcircuit? r- rAnswer
r- rW r= rE rtimes rI
A rparallel rcircuit rconsists rof rthree rresistors.R1 r= r30 rOhms, rR2 r= r15 rOhms, rR3 r= r10 rOhms. rIf rthe rcurrent
rthrough rR2 ris r4 rAmps r(I r= r4 rAmps), rwhat ris rthe rsource rVoltage? r- rAnswer r- r60 rvolts
Three r300 rohm rresistors rare rwired rin rparallel. rThe rtotal rresistance requals; r- rAnswer r- r100 rohms
An relectronically rcommutated rmotor r(ECM) ris rdesigned rto; r- rAnswer r- rprovide rproper rair rflow runder
rvarious rconditions.
Resistance rcan rbe rcalculated rby: r- rAnswer r- rE rdivided rby rI.
Divided rVoltage rcan rbe rcalculated rby; r- rAnswer r- rI rtimes rR
An rohmmeter rshould rnever rbe rconnected rto; r- rAnswer r- ra rlive rcircuit ror ra rcharged rcapacitor runtil rit rhas
rbeen rdischarged
Which rof rthe rfollowing rwould rbe rconsidered ran rinductive rload? r- rAnswer r- relectric rmotor
Questions And Answers With Correct
Update
Current rflow ris: r- rAnswer r- rThe rflow rof relectrons rin rthe rcircuit.
Impedance ris: r- rAnswer r- rOpposition rto ralternating rcurrent rflow.
Like rcharges; r- rAnswer r- rrepel reach rother.
Any rmaterial rthat rwill rreadily rrelease relectrons ris rcalled; r- rAnswer r- rA rconductor
The rsymbol rfor rcurrent ris; r- rAnswer r- rI
Which rof rthe rfollowing rmaterials rwould rbe rbest rsuited rfor ruse ras ra rsemi-conductor? r- rAnswer r- rsilicon
The rsafety rground rconductor ris rusually rcolor rcoded; r- rAnswer r- rgreen ror rbare.
An relectron rhas; r- rAnswer r- ra rnegative rcharge.
Resistance ris: r- rAnswer r- rOpposition rto rcurrent rflow.
How rmany rwatts rof rpower rare rused rby ra rheater roperating rat r240 rvolts rand rdrawing r5 ramps? r- rAnswer r-
r1200 rwatts
Which rof rthe rfollowing rmeters rmust ruse rits rinternal rpower rto rcheck ra rload ror rcircuit? r- rAnswer r-
rOhmmeter
In relectrical rwiring, ra rblack rcolored rwire rin ran ralternating rcurrent rcircuit rusually rindicates; r- rAnswer r-
rthe rhot rconductor.
Fuses rare rsized rby: r- rAnswer r- rVolts r& rAmps
What rwould rbe rthe rresult, rif ra r24 rvolt, r20-ohm rlow rvoltage rconta rctor rcoil rwere rwired rin rseries rwith ra
r24 rvolt, r200-ohm rcontrol rrelay rcoil? r- rAnswer r- rOnly rthe rcontrol rrelay rwould roperate.
Three rdefrost rheaters, reach r15 rohms rare rwired rin rparallel rto ra r120 rvolt rpower rsupply. rHow rmany rwatts
rof rpower rwill rbe rused? r- rAnswer r- r2880 rWatts
Which rof rthe rfollowing ris rgenerally rconsidered rto rbe rwithin rthe rmaximum rallowable r(plus ror rminus)
rsupply rvoltage rvariation? r- rAnswer r- r5%
Capacitors rare rrated rin r- rAnswer r- rMicrofarads r& rVolts.
When rtesting ra rcapacitor rwith ran ranalog ror rdigital rohmmeter, rthe rmeter rshould; r- rAnswer r- rmeasure
rlow rresistance rthen rreturn rto rhigh rreading.
, What ris rthe rterm rused rto rdescribe rthe routput rside rof ra rtransformer? r- rAnswer r- rSecondary rside.
One rhorsepower ris requal rto r__________ rwatts. r- rAnswer r- r746
How rmuch rresistance rmust rbe rplaced rin ra r120 rvolt rcircuit rin rorder rto rlimit rthe rcurrent rto r2 ramps? r-
rAnswer r- r60 rOhms
A rparallel rcircuit rcontains ra r18 rohm rand ra r9 rohm rresistor. rThe rtotal rresistance requals; r- rAnswer r- r6
rohms.
In ra rseries rcircuit, rthe rvoltage rdrop racross reach rresistance r(load) rwill. r- rAnswer r- radd rup rto requal rthe
rsource rvoltage.
The rtotal rresistance rof ra rparallel rcircuit rwill rbe; r- rAnswer r- rless rthan rthe rsmallest rresistance.
Which rof rthe rfollowing rstatements rabout rcurrent ris rtrue? r- rAnswer r- rCurrent rflow rwill rincrease rwhen
rvoltage rincreases.
When rresistors rare rwired rin rparallel; r- rAnswer r- rthe rvoltage rdrop racross reach rresistor rwill rbe rthe rsame
ras rthe rapplied rsource
Which rof rthe rfollowing ris requal rto r2.1KW? r- rAnswer r- r2,100 rWatts
Which rof rthe rfollowing ris requal rto r100 rmilliamps? r- rAnswer r- r0.10 ramperes
A rcapacitor ranalyzer ris rdesigned rto rread; r- rAnswer r- rthe rcapacitive rresistance rof ra rcapacitor.
On ran relectronic roil rsafety rswitch rwhat rchanges rthe rpressure rsingal rto relectrical rsignal? r- rAnswer r-
rTransducer.
The relectric rmeter ron ra rhouse rmeasures rthe r______________ rpassing rth rrough rit. r- rAnswer r- rwattage
A rthree rphase rload rrequires ra rminimum rof; r- rAnswer r- rthree rsupply rlines.
Which rof rthe rfollowing ris rthe rcorrect rformula rfor rdetermining rwattage rin ran relectrical rcircuit? r- rAnswer
r- rW r= rE rtimes rI
A rparallel rcircuit rconsists rof rthree rresistors.R1 r= r30 rOhms, rR2 r= r15 rOhms, rR3 r= r10 rOhms. rIf rthe rcurrent
rthrough rR2 ris r4 rAmps r(I r= r4 rAmps), rwhat ris rthe rsource rVoltage? r- rAnswer r- r60 rvolts
Three r300 rohm rresistors rare rwired rin rparallel. rThe rtotal rresistance requals; r- rAnswer r- r100 rohms
An relectronically rcommutated rmotor r(ECM) ris rdesigned rto; r- rAnswer r- rprovide rproper rair rflow runder
rvarious rconditions.
Resistance rcan rbe rcalculated rby: r- rAnswer r- rE rdivided rby rI.
Divided rVoltage rcan rbe rcalculated rby; r- rAnswer r- rI rtimes rR
An rohmmeter rshould rnever rbe rconnected rto; r- rAnswer r- ra rlive rcircuit ror ra rcharged rcapacitor runtil rit rhas
rbeen rdischarged
Which rof rthe rfollowing rwould rbe rconsidered ran rinductive rload? r- rAnswer r- relectric rmotor
