3 & 5 HVAC EXAM QUESTIONS WITH CORRECT ANSWERS

3 & 5 HVAC EXAM QUESTIONS WITH
m m m m m m


CORRECT ANSWERS 2025/2026
m m m
tubing mconsists mof mhigh-
density mpolyethylene mthat mhas mundergone mmolecule mmodification mthat mcreates msufficient mtie
mchains mbetwee mn mthe mpolyethene mmolecules mto mallow mit mto moperate mat mhigher
mtemperatures. m- mCORRECT mANSWER m-PE-RT



When mwater mis mused mas mthe msource mfluid mfor mopen mloop msystems, mthe mheat mpump mmust
mbe mconfigured mto mprev ment mfreezing mof mthe . m- mCORRECT mANSWER m-Evaporator



Am is ma mdevice mfor mconverting mlow-temperature mheat minto mhigher
mtemperature mheat. m- mCORRECT mANSWER m-Heat mPump




All msolar mthermal msystems muse ma to mconsisting mof
mone mor mmore . m- mCORRECT mANSWER m- mcollection marray, msolar
mcollectors




An mobjectâ ms mthermal m can mbe mdefined mas mits mthickness min mthe mdirection mof mheat
mflow mdivided mby mits mther mmal mconductivity. m- mCORRECT mANSWER m-Resistance




In man mideal mapplication, mthe mrate mof mheatYproduction mby mthe mheat msource mwould m the
mrate mof mheat mby mthe mheat memitters. m- mCORRECT mANSWER m-Exactly mmatch



All mheating msystems mconsist mof mdevices mthat mconvert mone mform mof menergy minto manother. m-
mCORRECT mANSWER m- mTrue




AYdevice mused mto mallow mor mprevent mflow mthrough ma mzone mcircuit mis mcalled ma(n) . m-
mCORRECT mANSWER m- mZone mValve




A(n) is mcommonly mused mto mmount man mair mvent mat mhigh mpoints min mpiping mcircuits. m-
mCORRECT mANSWER m- mBaseboard mTee



Another mspecialty mvalve mwidely mused min mhydronic msystems mprovides mthe mability mto misolate,
mflow mbalance, mand meven mdrain mindividual mheat memitters. mIt mis mcalled ma m . m- mCORRECT
mANSWER m-Lockshield mValve

, Copper mwater mtube mis mavailable min mthree mwall mthicknesses mdesignated mas mtypes m in
morder mof mdecreasing mwall mthickness. m- mCORRECT mANSWER m-K, mL, mand mM




Unlike mPEX mtubing, mPEX-AL-
PEX mtubing mcannot mbe mrepaired mby mheating mthe mtub muntil mthe mPEX
mreaches mits state.
m- mCORRECT mANSWER m-amorphous



Fittings mfor mcopper mtubing mare mavailable min meither mwrought mcopper mor m . m- mCORRECT
mANSWER m-Cast mBrass




Feed mwater mvalves moperate mby mbalancing mthe mforce mgenerated mby mwater mpressure magainst man
minternal mflexible
, mwith mthe mcounterforce mgenerated mby ma mpartially mcompressed mspring. m-
mCORRECT mANSWER m- mDiaphragm




When msoldering mcopper mtubing mbe msure mthe mtube mcut mis msquare. mUse ma(n) m with
ma mblade msuitable mfor mthe mcopper mtubing. m- mCORRECT mANSWER m-wheel mcutter mor mchop
msaw




A mfeed mwater mvalve mis mused mto mincrease mthe mpressure mof mwater mfrom ma mdomestic mwater
mdistribution mpipe mbefo mre mit menters ma mhydronic msystem. m- mCORRECT mANSWER m-False




When mlong mstraight mruns mof mrigid mtubing mare mrequired, mit mmay mbe mnecessary mto minstall
man mexpansion mloop mor ma mn mexpansion moffset mto mabsorb mthe mmovement. mAnother
malternative mis mto minstall man mexpansion m m m m capable mo mf mabsorbing mthe
mmovement. m- mCORRECT mANSWER m-compensator



are mdesigned mspecifically mfor mcomponent misolation. m- mCORRECT mANSWER m-Gate mValves



Hydronic mheating msystems mshould mnever muse ma mcombination mof mflexible mand mrigid mpiping
mmaterials. m- mCORRECT mANSWER m-False



Some mcommon mpipe mfittings min mhydronic msystems minclude . m- mCORRECT
mANSWER m- mcouplings, melbows, mand mtees