NJ BLUE SEAL REFRIGERATION
EXAM QUESTIONS WITH CORRECT
ANSWERS GRADED A+ FOR 2025-
2026 ASSURED EXCEL!
Onfafsinglefactingfreciprocatingfcompressor,fwhatfisftheffunctionfoffafdualfcontrolfdevice?f-
ffCORRECTfANSWERSItfallowsfconstantfspeedfcontrolfandfstopsfandfstarts
Iffafsystemfwerefusingfanfautomaticfexpansionfvalve,fwherefwouldfthefconstantfpressurefbefmaintainedfat?
f-ffCORRECTfANSWERSThefevaporator
Whatfisfthefmainfadvantagefoffafcascadefrefrigerationfsystem?f-
ffCORRECTfANSWERSCapablefoffreachingfveryflowftemperatures
Affalsefstatementfaboutflithiumfbromidefusedfinfabsorptionfsystems:f-ffCORRECTfANSWERSItfisfnon-
corrosive
Whatfisfafslingfpsychrometerfusedftofmeasure?f-ffCORRECTfANSWERSRelativefhumidity
Discribefthefdischargefgasffromfthefcompressorfinfafwet-compressionfrefrigerationfsystemf-
ffCORRECTfANSWERSSaturated
Iffafcoolingftowerfcirculatedf4,300fGPMfoffwater,fwhatfisfthefcoolingfcapacityfinftons?f-
ffCORRECTfANSWERS4,300/3f=f1,433ftons
Whatfconditionfwouldfcausefafsystemftofnotfrespondftofanfexpansionfvalvefadjustment?f-
ffCORRECTfANSWERSOilfinfthefevaporator
Whatfwouldfhavefthefleastfeffectfonfthefcapacityfoffafwaterfcooledfcondenser?f-
ffCORRECTfANSWERSThefambientfairftemperature
,Whatfisfthefvolumefoccupiedfbyfafrefrigerantfunderfspecifiedfconditionsfoffpressurefandftemperature?f-
ffCORRECTfANSWERSSpecificfvolume
WhatfshouldfcoolingftowerfwaterfpHfbefmaintainedfat?f-ffCORRECTfANSWERS8
ThefabsolutefCelsiusfscalefisfreferredftofbyfwhichftemperaturefscale?f-ffCORRECTfANSWERSKelvin
Whichfdevicesfcontrolfthefhighfsideffloat?f-ffCORRECTfANSWERSCondenserfandfreceiver
InfFahrenheit,fwhatfisfthefequivalentfoff-15fdegreesfCelsius?f-ffCORRECTfANSWERS5fdegreesfF
Iffyoufhadfaffloodedfevaporator,fwhichftypefoffmeteringfdevicefwouldfyoufuse?f-
ffCORRECTfANSWERSLowfsideffloat
Whatfisfthefformulafusedftofdeterminefthefnumberfoffcyclesfoffconcentrationfforfafcoolingftower?f-
ffCORRECTfANSWERSCyclesf=fTowerfwaterfchloridesf/fmakeupfwaterfchlorides
Whatfdeterminesftheflowfsidefpressurefinfafrefrigerationfsystem?f-
ffCORRECTfANSWERSThefevaporatorfflowfrate
Whatfsealfisfnotfusedfonfafrefrigerationfsystem?f-ffCORRECTfANSWERSMechanical
Whatfwaterfchemistryftestfisfusedftofdeterminefcoolingftowerfcyclesfoffconcentration?f-
ffCORRECTfANSWERSChlorides
Whatfwouldfhappenfiffyoufhadfafsuddenfdropfinftheftemperaturefinfthefcoolingftowerfoffaflithiumfbromidefa
bsorptionfsystem?f-ffCORRECTfANSWERSCrystallizationfinfthefsystem
Defineftheftermf"Refrigerantfreclaiming"f-
ffCORRECTfANSWERSChemicallyfanalyzingfandfdistillingfthefrefrigerant;fReprocessingfthefrefrigerantfintofaf
newfproductfthatfcanfbefreused;fSellingfreprocessedfrefrigerantfasfreclaimedfrefrigerant
, Describeftheftermf"freefair"f-ffCORRECTfANSWERSAirfatfatmosphericfconditions
Howfisfthefsettingfonfafthermosticfexpansionfvalvefrated?f-ffCORRECTfANSWERSDegreesfoffsuperheat
Describefthefoperationfoffafsinglefactingfcompressorf-
ffCORRECTfANSWERSThefrefrigerantfgasfisfcompressedfonfonlyfonefsidefoffthefpiston
Whatfwouldfcausefafnoisyfcompressor?f-
ffCORRECTfANSWERSLackfoffoil;fdryforfdamagedfseal;floosefdrivefcoupling
Thermostaticfexpansionfvalvesfarefratedfinfwhatfunitsfoffmeasurement?f-
ffCORRECTfANSWERSTonsfoffrefrigeration
IffafcoolingftowerfhasfafpHfoff7.8,fitfis:f-ffCORRECTfANSWERSSlightlyfalkaline
Wherefwouldfyouffindfflashfgasfinfanfefficientlyfoperatingfsystem?f-ffCORRECTfANSWERSInfthefevaporator
Afcoolingftowerfisfcirculatingf2,850fGPMfoffwater;fwhatfisfthefcoolingfcapacityfinftons?f-
ffCORRECTfANSWERS2,850/3f=f950ftons
Whatfconditionsfcanfcausefhighfdischargefpressurefinfafsystem?f-
ffCORRECTfANSWERSRefrigerantfovercharge;fanfundersizedfcondenser;finsufficientfcoolingfwaterftofthefco
ndenser
Whatfwouldffrostfonfthefsuctionflinefoffafsystemfusingfafhighfsideffloatefindicate?f-
ffCORRECTfANSWERSOverchargedfsystem
Whatftypefoffheatfexchangefoccursfatfthefexteriorfsidesfoffafcoolingftower?f-
ffCORRECTfANSWERSConvection
Whatfisftruefregardingfthefcompressionfratiofoffafreciprocatingfcompressor?f-
ffCORRECTfANSWERSRatiofvariesfaccordingftofthefconditionsfunderfwhichfitfoperates
EXAM QUESTIONS WITH CORRECT
ANSWERS GRADED A+ FOR 2025-
2026 ASSURED EXCEL!
Onfafsinglefactingfreciprocatingfcompressor,fwhatfisftheffunctionfoffafdualfcontrolfdevice?f-
ffCORRECTfANSWERSItfallowsfconstantfspeedfcontrolfandfstopsfandfstarts
Iffafsystemfwerefusingfanfautomaticfexpansionfvalve,fwherefwouldfthefconstantfpressurefbefmaintainedfat?
f-ffCORRECTfANSWERSThefevaporator
Whatfisfthefmainfadvantagefoffafcascadefrefrigerationfsystem?f-
ffCORRECTfANSWERSCapablefoffreachingfveryflowftemperatures
Affalsefstatementfaboutflithiumfbromidefusedfinfabsorptionfsystems:f-ffCORRECTfANSWERSItfisfnon-
corrosive
Whatfisfafslingfpsychrometerfusedftofmeasure?f-ffCORRECTfANSWERSRelativefhumidity
Discribefthefdischargefgasffromfthefcompressorfinfafwet-compressionfrefrigerationfsystemf-
ffCORRECTfANSWERSSaturated
Iffafcoolingftowerfcirculatedf4,300fGPMfoffwater,fwhatfisfthefcoolingfcapacityfinftons?f-
ffCORRECTfANSWERS4,300/3f=f1,433ftons
Whatfconditionfwouldfcausefafsystemftofnotfrespondftofanfexpansionfvalvefadjustment?f-
ffCORRECTfANSWERSOilfinfthefevaporator
Whatfwouldfhavefthefleastfeffectfonfthefcapacityfoffafwaterfcooledfcondenser?f-
ffCORRECTfANSWERSThefambientfairftemperature
,Whatfisfthefvolumefoccupiedfbyfafrefrigerantfunderfspecifiedfconditionsfoffpressurefandftemperature?f-
ffCORRECTfANSWERSSpecificfvolume
WhatfshouldfcoolingftowerfwaterfpHfbefmaintainedfat?f-ffCORRECTfANSWERS8
ThefabsolutefCelsiusfscalefisfreferredftofbyfwhichftemperaturefscale?f-ffCORRECTfANSWERSKelvin
Whichfdevicesfcontrolfthefhighfsideffloat?f-ffCORRECTfANSWERSCondenserfandfreceiver
InfFahrenheit,fwhatfisfthefequivalentfoff-15fdegreesfCelsius?f-ffCORRECTfANSWERS5fdegreesfF
Iffyoufhadfaffloodedfevaporator,fwhichftypefoffmeteringfdevicefwouldfyoufuse?f-
ffCORRECTfANSWERSLowfsideffloat
Whatfisfthefformulafusedftofdeterminefthefnumberfoffcyclesfoffconcentrationfforfafcoolingftower?f-
ffCORRECTfANSWERSCyclesf=fTowerfwaterfchloridesf/fmakeupfwaterfchlorides
Whatfdeterminesftheflowfsidefpressurefinfafrefrigerationfsystem?f-
ffCORRECTfANSWERSThefevaporatorfflowfrate
Whatfsealfisfnotfusedfonfafrefrigerationfsystem?f-ffCORRECTfANSWERSMechanical
Whatfwaterfchemistryftestfisfusedftofdeterminefcoolingftowerfcyclesfoffconcentration?f-
ffCORRECTfANSWERSChlorides
Whatfwouldfhappenfiffyoufhadfafsuddenfdropfinftheftemperaturefinfthefcoolingftowerfoffaflithiumfbromidefa
bsorptionfsystem?f-ffCORRECTfANSWERSCrystallizationfinfthefsystem
Defineftheftermf"Refrigerantfreclaiming"f-
ffCORRECTfANSWERSChemicallyfanalyzingfandfdistillingfthefrefrigerant;fReprocessingfthefrefrigerantfintofaf
newfproductfthatfcanfbefreused;fSellingfreprocessedfrefrigerantfasfreclaimedfrefrigerant
, Describeftheftermf"freefair"f-ffCORRECTfANSWERSAirfatfatmosphericfconditions
Howfisfthefsettingfonfafthermosticfexpansionfvalvefrated?f-ffCORRECTfANSWERSDegreesfoffsuperheat
Describefthefoperationfoffafsinglefactingfcompressorf-
ffCORRECTfANSWERSThefrefrigerantfgasfisfcompressedfonfonlyfonefsidefoffthefpiston
Whatfwouldfcausefafnoisyfcompressor?f-
ffCORRECTfANSWERSLackfoffoil;fdryforfdamagedfseal;floosefdrivefcoupling
Thermostaticfexpansionfvalvesfarefratedfinfwhatfunitsfoffmeasurement?f-
ffCORRECTfANSWERSTonsfoffrefrigeration
IffafcoolingftowerfhasfafpHfoff7.8,fitfis:f-ffCORRECTfANSWERSSlightlyfalkaline
Wherefwouldfyouffindfflashfgasfinfanfefficientlyfoperatingfsystem?f-ffCORRECTfANSWERSInfthefevaporator
Afcoolingftowerfisfcirculatingf2,850fGPMfoffwater;fwhatfisfthefcoolingfcapacityfinftons?f-
ffCORRECTfANSWERS2,850/3f=f950ftons
Whatfconditionsfcanfcausefhighfdischargefpressurefinfafsystem?f-
ffCORRECTfANSWERSRefrigerantfovercharge;fanfundersizedfcondenser;finsufficientfcoolingfwaterftofthefco
ndenser
Whatfwouldffrostfonfthefsuctionflinefoffafsystemfusingfafhighfsideffloatefindicate?f-
ffCORRECTfANSWERSOverchargedfsystem
Whatftypefoffheatfexchangefoccursfatfthefexteriorfsidesfoffafcoolingftower?f-
ffCORRECTfANSWERSConvection
Whatfisftruefregardingfthefcompressionfratiofoffafreciprocatingfcompressor?f-
ffCORRECTfANSWERSRatiofvariesfaccordingftofthefconditionsfunderfwhichfitfoperates
