Refrigeration final exam QUESTIONS WITH CORRECT ANSWERS RATED A+.

REFRIGERATION FINAL EXAM
QUESTIONS WITH CORRECT
ANSWERS RATED A+
ARhotRpullRdownRoccursRwhen:

a)RthereRisRexcessiveRiceRonRtheRevaporator

b)RtheRcondenserRhasRbeenRflooded

c)RtheRmeteringRdeviceRisRstarvingRtheRevaporator

d)RtheRtemperatureRofRtheRloadRisRhighRandRtheRcompressorRhasRtoRrunRforRlongRperiodsRofRtimeRtoR
lowerRtheRload

d)RallRofRtheRaboveR-RCORRECTRANSWERS-d)



TheRreceiverRisRlocatedRinRthe:R-RCORRECTRANSWERS-LiquidRline



TheRsolenoidRvalveRisRusedRtoRcontrolRfluidRflow.RThisRvalve:

a)RhasRaRslowRreactionRtime

b)RhasRaRfastRorRsnapRaction

c)RisRusedRtoRcontrolRfanRspeed

d)RisRusuallyRnormallyRopenRinRmostRrefrigerationRapplicationsR-RCORRECTRANSWERS-b)



AnREEPRRvalveRusesRaRsensorRinRtheRrefrigeratedRcases's:

a)RreturnRair

b)RdischargeRair

c)RevaporatorRoutlet

d)RevaporatorRinlet

e)RnoneRofRtheRaboveR-RCORRECTRANSWERS-b)

,ARtechRmust_________________RtheRsuctionRserviceRvaleRbeforeRremovingRtheRgaugeRhoseRwhen
RserviceRisRcomplete



a)RFrontRseat

b)RBackRseat

c)RMidRseat

d)RCrackR-RCORRECTRANSWERS-b)



WhatRisRtheRpurposeRofRinstallingRaRcrankRcaseRheater?R-RCORRECTRANSWERS-
ToRensureRliquidRrefrigerantRdoesRnotRmigrateRduringRlowRambient



WhatRvalveRisRlocatedRonRtheRoutletRofRtheRreceiver?R-RCORRECTRANSWERS-kingRvalve



AtRwhatRlocationRinRaRregrigerationRsytemRwouldRaRtechRinstallRanRoilRsperator?R(inRbetweenRwhatR
2RmojorRcomponents)R-RCORRECTRANSWERS-compressorRandRcondenser



toRprotectRtheRcompressorRfromRdamageRwhenRrefrigerantRlossRoccursRdueRtoRaRlargeRleak,RaR____
_________RswitchRshouldRbeRinstalledR-RCORRECTRANSWERS-pressure



aRCPRRvalve________RonRriseRof_____RpresureR-RCORRECTRANSWERS-close/Routlet



anREPRRvalveR____________RonRriseRofR_________RpressureR-RCORRECTRANSWERS-opens/Rinlet



WhyRwouldRaRtechRincorporateREPRRvalvesRintoRaRrefrigerationRsystem?R-RCORRECTRANSWERS-
MultipleRtemperatureRandRmultipleRevaporators



TheRentireRrefrigerantRchargeRofRaRsystemRshouldRonlyRfillRwhatRpercentageRofRtheRreceiver?

a)R50%

,b)R60%

c)R80%

d)R100%

e)R110%R-RCORRECTRANSWERS-c)



WhatRtypeRofRvalveRcanRbeRinstalledRbetweenRtheRreceiverRandRtheRpressureRreliefRvalve(s)?

a)RballRvalve

b)RgateRvalve

c)Rthree-wayRvalve

d)RemergencyRvalve

e)RnoRvalveR-RCORRECTRANSWERS-c)



2RtypesRofRpressureRreliefRvalvesRfoundRonRrefrigerationRsystems:R-RCORRECTRANSWERS-
springRvalve

oneRtime



HowRdoesRaRpilotRperatedRliguidRlineRsolenoidRvalveRoperate?R-RCORRECTRANSWERS-
SignalRsentRforRsystemRpressureRtoRstartRandRstopRflow



AirRconditioningRsystems:

a)RinitiateRdefrostRwithRaRdefrostRclock

b)RinitiateRdefrostRwithRaRpressureRswitchR

c)RdefrostRduringRoffRcycleRwhenRtheRthermostatRisRsatisfiedR

d)RdoRnotRrequireRdefrostR-RCORRECTRANSWERS-d)



ARlowRpressureRswitchRwill________RonRriseRinRpressureR-RCORRECTRANSWERS-close

, ARhighRpressureRsafetyRswitchRwillR______RonRriseRinRheadRpressureR-RCORRECTRANSWERS-open



ARfanRcyclingRswitchRwillR_______RonRriseRinRheadRpressureR-RCORRECTRANSWERS-close



WhenRtheRboxRtemperatureRisRsatisfied,RtheRthermostatRcontactsRonRtheRthermostatRwill_______R
-RCORRECTRANSWERS-open



DampersRforRaRcondenserRwillR______RduringRlowRambientRconditionsR-RCORRECTRANSWERS-close



InRanRautomaticRpump-downRsystem,RtheRthermostatRcontrolsRtheR________RoperationR-
RCORRECTRANSWERS-solenoidRvalve




InRanRautomaticRpump-downRsystem,RtheRpressureRcontrollerRwillRcontrolRtheR______RoperationR-
RCORRECTRANSWERS-compressor




RandomRdefrostRisRaccomplished:

a)RwithRaRtimer

b)RusingRtheRhighRpressureRcontrol

c)RusingRtheRlowRpressureRcontrol

d)RduringRnormalRoffRcycleRwhenRtheRboxRisRsatisfiedR-RCORRECTRANSWERS-d)



DuringRelectricRdefrostRinRaRfreezer:

a)RtheRcompressorRandRtheRevaporatorRfansRwouldRbeRoff

b)RtheRelectricRheatersRandRtheRcompressorRwouldRbeRon

c)RtheRelectricRheatersRandRtheRcompressorRwouldRbeRon

d)RallRofRtheRaboveRareRpossibleR-RCORRECTRANSWERS-a)