Air Conditioning Certification Exam
(Exam Code A-02) with correct
answers 2025
Heatvwhichvcausesvavchangevinvtemperaturevofvavsubstancevisvcalled;v-vcorrect-
answerssensiblevheat.
Heatvwhichvcausesvavchangevinvstatevofvavmaterialvwithoutvavchangevinvtemperaturevisvcalled;v-
vcorrect-answerslatentvheat.
Heatvwhichvisvaddedvtovavvaporvaftervthevchangevofvstatevoccursvisvcalled;v-vcorrect-
answerssuperheat.
Heatvcanvtravelvby;v-vcorrect-answersconduction,vconvection,vradiation.
Thevmovementvofvheatvbyvwayvofvfluidv(orvair)visvcalled;v-vcorrect-answersconvectionv.
Thevmovementvofvheatvbyvdirectvcontactvisvcalled;v-vcorrect-answersconductionv.
Thevstandardvunitvforvmeasuringvthevquantityvofvheatvinvavsubstancevis;v-vcorrect-
answersthevBritishvThermalvUnitv(Btu).
, Avrefrigeratvgivesvupvheatvwhen;v-vcorrect-answersitvcondenses.
Itvisvdesirablevforvrefrigerantvinvthevsuctionvlinevtovbevslightlyvsuperheatedvinvordervto;v-vcorrect-
answersinsurevliquidvrefrigerantvdoesvnotventervthevcompressor.
Thevstatevofvrefrigerantvinvthevsuctionvlinevshouldvbe;v-vcorrect-
answerslowvpressure/vlowvtemperature.
Thevstatevofvthevrefrigerantventeringvthevcondenservis;v-vcorrect-
answershighvpressure/vhighlyvsuperheatedvliquid.
Thevevaporator;v-vcorrect-answersTransfersvheatvfromvthevrefrigerantvtovthevambientvair.
WhichvofvthevfollowingvisvNOTvavthermodynamicvpropertyvofvrefrigerants?
a)vCriticalvpoint.
b)vSaturationvpoint.
c)vEnthalpy.
d)vFlammability.v-vcorrect-answersd)vFlammability.
Thevsequentialvordervofvstepsvinvthevvaporv-vcompressionvprocessvare;v-vcorrect-
answerscompression,vcondensation,vexpansion,vvaporization.
Ifvav30vpoundvcylindervofvreclaimedvR-
12vrefrigerantvhasvbeenvstoredvovervnightvatv70°F,vthevpressurevinvthevcylindervshouldvbevapproxim
ately;v-vcorrect-answers70.2vPsig.
Pressuresvlowervthanvatmosphericvarevmeasuredvin;v
(Exam Code A-02) with correct
answers 2025
Heatvwhichvcausesvavchangevinvtemperaturevofvavsubstancevisvcalled;v-vcorrect-
answerssensiblevheat.
Heatvwhichvcausesvavchangevinvstatevofvavmaterialvwithoutvavchangevinvtemperaturevisvcalled;v-
vcorrect-answerslatentvheat.
Heatvwhichvisvaddedvtovavvaporvaftervthevchangevofvstatevoccursvisvcalled;v-vcorrect-
answerssuperheat.
Heatvcanvtravelvby;v-vcorrect-answersconduction,vconvection,vradiation.
Thevmovementvofvheatvbyvwayvofvfluidv(orvair)visvcalled;v-vcorrect-answersconvectionv.
Thevmovementvofvheatvbyvdirectvcontactvisvcalled;v-vcorrect-answersconductionv.
Thevstandardvunitvforvmeasuringvthevquantityvofvheatvinvavsubstancevis;v-vcorrect-
answersthevBritishvThermalvUnitv(Btu).
, Avrefrigeratvgivesvupvheatvwhen;v-vcorrect-answersitvcondenses.
Itvisvdesirablevforvrefrigerantvinvthevsuctionvlinevtovbevslightlyvsuperheatedvinvordervto;v-vcorrect-
answersinsurevliquidvrefrigerantvdoesvnotventervthevcompressor.
Thevstatevofvrefrigerantvinvthevsuctionvlinevshouldvbe;v-vcorrect-
answerslowvpressure/vlowvtemperature.
Thevstatevofvthevrefrigerantventeringvthevcondenservis;v-vcorrect-
answershighvpressure/vhighlyvsuperheatedvliquid.
Thevevaporator;v-vcorrect-answersTransfersvheatvfromvthevrefrigerantvtovthevambientvair.
WhichvofvthevfollowingvisvNOTvavthermodynamicvpropertyvofvrefrigerants?
a)vCriticalvpoint.
b)vSaturationvpoint.
c)vEnthalpy.
d)vFlammability.v-vcorrect-answersd)vFlammability.
Thevsequentialvordervofvstepsvinvthevvaporv-vcompressionvprocessvare;v-vcorrect-
answerscompression,vcondensation,vexpansion,vvaporization.
Ifvav30vpoundvcylindervofvreclaimedvR-
12vrefrigerantvhasvbeenvstoredvovervnightvatv70°F,vthevpressurevinvthevcylindervshouldvbevapproxim
ately;v-vcorrect-answers70.2vPsig.
Pressuresvlowervthanvatmosphericvarevmeasuredvin;v
