REFRIGERATION EXAM QUESTIONS
WITH CORRECT ANSWERS
AQtonQofQrefrigerationQorQairQconditioningQcapacityQisQequalQto:Q-QCORRECTQANSWERS-
c.Q12000QbritishQthermalQunitsQinQoneQhour
IfQ14.7QlbsQisQtheQabsoluteQpressure,QwhatQisQtheQgaugeQpressure?Q-QCORRECTQANSWERS-
b.Q0QPSIG
R-12QboilsQatQwhatQtemperature?Q-QCORRECTQANSWERS-c.Q-21.7QFahrenheit
SuctionQlinesQareQusuallyQsizedQfor:Q-QCORRECTQANSWERS-c.Q2QdegreesQtemperatureQchange
AQrefrigerantQgaugeQandQtestingQmanifoldQhas:Q-QCORRECTQANSWERS-
d.Q2Qgauges,Q2Qvalves,QandQ3Qports
AQfanQmotorQrunsQatQ1800QRPMQunderQload.QItQhasQaQ3QinchQpulleyQandQdrivesQaQfanQequippedQwit
hQaQ9QinchQpulley.QWhatQisQtheQfanQspeed?Q-QCORRECTQANSWERS-a.Q600QRPM
LockedQrotorQcurrentQisQusually:Q-QCORRECTQANSWERS-c.Q4-6QtimesQtheQrunQcurrent.
WhatQresistanceQisQthereQinQaQgood,QusuallyQclosedQrelayQcontacts?Q-QCORRECTQANSWERS-
a.Q0Qohms
TheQboilingQpointQofQammoniaQatQatmosphericQpressureQis:Q-QCORRECTQANSWERS-d.Q-
28QdegreesQF
, TheQweQbulbQtemperatureQisQtheQsameQasQtheQdryQbulbQwhenQyouQhave:Q-QCORRECTQANSWERS-
d.Q100%QRH
TheQtotalQcapacitanceQofQtwoQ100QuFQcapacitorsQconnectedQinQseriesQis:Q-QCORRECTQANSWERS-
b.Q50QuF
InQtransferringQrefrigerantQfromQoneQcylinderQtoQanother,QitQisQaQgoodQideaQtoQavoidQfillingQtheQcyl
inderQmoreQthanQ_____Q%Qfull.Q-QCORRECTQANSWERS-c.Q80%
TheQB-
52QmechanicalQcodeQstatesQthatQliquidQreceiversQorQpartsQofQaQsystemQdesignedQtoQreceiveQtheQre
frigerantQchargeQduringQpumpdownQshallQbeQfilledQtoQnoQmoreQthan:Q-QCORRECTQANSWERS-
c:Q90%QatQ32Qcelcius
HowQmuchQheatQmustQbeQremovedQtoQcoolQ1000QlbsQofQwaterQfromQ72QdegreesQFtoQ-
18QdegreesQF?Q-QCORRECTQANSWERS-c.Q209,000QBTH
WhichQofQtheQfollowingQisQtheQrankineQscaleQforQabsoluteQzero?Q-QCORRECTQANSWERS-a.Q0
AQlampQhasQaQsourceQvoltageQofQ110QvoltsQandQaQcurrentQofQ0.9Qamps.QWhatQisQtheQresistanceQofQ
theQlamp?Q-QCORRECTQANSWERS-b.Q122.22Qohms
WhatQareQtheQbasicQvoltagesQthatQcanQbeQtakenQoffQofQaQ4QwireQ208QvoltQsystem?Q-
QCORRECTQANSWERS-b.Q208/3/60QandQ208/120/1/60
CheckingQtheQsecondaryQvoltageQofQaQtransformer,QyouQfindQtheQoutputQisQ24QvoltsQandQ20Qamps.Q
TheQturnsQratioQofQtheQtransformerQisQ5:1.QDetermineQtheQvoltageQandQamperageQofQtheQprimary.
Q-QCORRECTQANSWERS-a.Q120Qvolts,Q4Qamps