EPA 608 TYPE 2 TEST QUESTIONS WITH
ANSWERS
When ba bnew bsystem bhas bbeen bassembled, bthe bfirst bthing bto bdo bis? b-
banswersPressurize bthe bsystem bwith ban binert bgas b& bleak bcheck.
After binstallation bof ba bfield-piped bR-410A bsplit bheat bpulp, bthe bunit bshould bfirst bbe?
b- banswersPressurized bwith bnitrogen bthen bleak bchecked.
The bEPA bregulations brequire bthat bany bappliances bcontaining bmore bthan b50
bpounds bof brefrigerant b(except bfor bcommercial b& bindustrial bprocess brefrigeration)
bmust bbe brepaired bwhen bthe bleak brate bexceeds b_________ bof bthe bcharge bper
byear? b- banswers15%
R-410A brequires brecovery btanks brated bfor bat bleast? b- banswers400 bpsig
After brefrigerant bliquid bhas bbeen brecovered bfrom ba bsystem, bany bremaining bvapor
bis? b- banswersCondensed bby bthe brecovery bsystem.
Your brecovery/recycling bmachine bhas bR-502 brefrigerant bin bit. bYou bnow bhave bto
brecover brefrigerant bfrom ba bunit bwith bR-22. bWhat bmust bbe bdone bbefore bthe bR-22
brefrigerant bcan bbe brecovered/recycled? b- banswersRecover bas bmuch bR-502 bfrom
bthe brecovery bunit bas bpossible, bchange bfilter, b& bevacuate.
In ba brefrigeration bsystem bwith ba bTXV b(or bother btype bof bthrottling bdevice), bthe
bcomponent bdirectly bfollowing bthe bcondenser bis bthe? b- banswersReceiver
When bcharging ban bR-410A bsystem bthat buses ba bwater-cooled bcondenser, byou
bmust bfirst bcharge bwith bvapor bto ba bpressure bof bat bleast________, bbefore bswitching
bto bliquid bcharging. b- banswers120 bpsig
Recovered brefrigerant bmay bcontain bwhat? b- banswers1.) bAcids
2.) bMoisture
3.) bOils
Your brecovery/recycling bmachine bhas bR-22 brefrigerant bin bit. bYou bnow bhave bto
brecover brefrigerant bfrom ba bunit bwith bR-410A. bWhat bmust bbe bdone bbefore byour
brecovery bunit bcan bbe bused bto brecover bR-410A? b- banswers1.) bThe brecovery bunit
bmust bbe bEPA bcertified bfor buse bwith bR-410A.
2.) bThe brecovery btank bmust bbe bdesigned bfor bthe bpressure bof bR-410A.
3.) bThe bfilter b& blubricant bin bthe brecovery bunit bmust bbe bchanged, b& bthe brecovery
bunit bevacuated.
, To brecover bliquid brefrigerant, byou bmust bconnect bone bhose bto bthe? b-
banswersLiquid bLine.
The bproper bcharging bmethod bfor bblended b(non-azeotropic) brefrigerants b(400
bSeries) bis bto buse ba bremove bthe bcharge bfrom bthe bcylinder bas ba? b- banswersLiquid
Before busing ba brecovery bunit bto bremove ba bcharge, bwhat bsteps bshould bbe btaken?
b- banswers1.) bCheck bservice bvalve bpositions.
2.) bCheck bthe boil blevel bin bthe brecovery bunit.
3.) bEvacuate brecovery bunit b& brecovery btank.
On brefrigeration bunits bthat buse ban bopen bcompressor; bthe b________ bis bmost blikely
bto bleak bif bthe bunit bis bnot bused bfor bseveral bmonths. b- banswersThe brotating bshaft
bseal.
Noncondensables bin ba bsystem bcause? b- banswersHigher bdischarge bpressure.
Heat bPumps bthat buse bR-410A bshould bbe bleak bchecked bwith? b-
banswersPressurized bNitrogen.
A breciprocating bcompressor bshould bnot bbe benergized bwhen? b- banswersThe
bdischarge bservice bvalve bis bclosed.
In ba brefrigeration bsystem, bthe bcomponent bdirectly bfollowing bthe bevaporator bis bthe?
b- banswersAccumulator.
Manifold bgauge bset bhoses bshould bhave bself-sealing bconnectors bor bhand bvalves
bto? b- banswersMinimize bthe brelease bof brefrigerant bwhen bthe bhoses bare bconnected
b& bdisconnected.
The bEPA bregulations brequire bthat bleaking bcommercial bor bindustrial bprocess
brefrigeration bequipment bmust bbe brepaired bwhen bthe bleak brate bexceeds b_____ bof
bthe bcharge bper byear. b- banswers35%
Moisture bis bremoved bfrom ba bsystem bby? b- banswersUsing ba bfilter bdrier.
Oil bfoaming busually boccurs bin bthe? b- banswersCompressor
R-410A bis bdifferent bfrom bother bASHRAE b400 bseries bnon-azeotropic bblends
bbecause? b- banswersR-410A bbehaves bas ba bnear bazeotropic brefrigerant, b& bcan bbe
btopped boff.
ANSWERS
When ba bnew bsystem bhas bbeen bassembled, bthe bfirst bthing bto bdo bis? b-
banswersPressurize bthe bsystem bwith ban binert bgas b& bleak bcheck.
After binstallation bof ba bfield-piped bR-410A bsplit bheat bpulp, bthe bunit bshould bfirst bbe?
b- banswersPressurized bwith bnitrogen bthen bleak bchecked.
The bEPA bregulations brequire bthat bany bappliances bcontaining bmore bthan b50
bpounds bof brefrigerant b(except bfor bcommercial b& bindustrial bprocess brefrigeration)
bmust bbe brepaired bwhen bthe bleak brate bexceeds b_________ bof bthe bcharge bper
byear? b- banswers15%
R-410A brequires brecovery btanks brated bfor bat bleast? b- banswers400 bpsig
After brefrigerant bliquid bhas bbeen brecovered bfrom ba bsystem, bany bremaining bvapor
bis? b- banswersCondensed bby bthe brecovery bsystem.
Your brecovery/recycling bmachine bhas bR-502 brefrigerant bin bit. bYou bnow bhave bto
brecover brefrigerant bfrom ba bunit bwith bR-22. bWhat bmust bbe bdone bbefore bthe bR-22
brefrigerant bcan bbe brecovered/recycled? b- banswersRecover bas bmuch bR-502 bfrom
bthe brecovery bunit bas bpossible, bchange bfilter, b& bevacuate.
In ba brefrigeration bsystem bwith ba bTXV b(or bother btype bof bthrottling bdevice), bthe
bcomponent bdirectly bfollowing bthe bcondenser bis bthe? b- banswersReceiver
When bcharging ban bR-410A bsystem bthat buses ba bwater-cooled bcondenser, byou
bmust bfirst bcharge bwith bvapor bto ba bpressure bof bat bleast________, bbefore bswitching
bto bliquid bcharging. b- banswers120 bpsig
Recovered brefrigerant bmay bcontain bwhat? b- banswers1.) bAcids
2.) bMoisture
3.) bOils
Your brecovery/recycling bmachine bhas bR-22 brefrigerant bin bit. bYou bnow bhave bto
brecover brefrigerant bfrom ba bunit bwith bR-410A. bWhat bmust bbe bdone bbefore byour
brecovery bunit bcan bbe bused bto brecover bR-410A? b- banswers1.) bThe brecovery bunit
bmust bbe bEPA bcertified bfor buse bwith bR-410A.
2.) bThe brecovery btank bmust bbe bdesigned bfor bthe bpressure bof bR-410A.
3.) bThe bfilter b& blubricant bin bthe brecovery bunit bmust bbe bchanged, b& bthe brecovery
bunit bevacuated.
, To brecover bliquid brefrigerant, byou bmust bconnect bone bhose bto bthe? b-
banswersLiquid bLine.
The bproper bcharging bmethod bfor bblended b(non-azeotropic) brefrigerants b(400
bSeries) bis bto buse ba bremove bthe bcharge bfrom bthe bcylinder bas ba? b- banswersLiquid
Before busing ba brecovery bunit bto bremove ba bcharge, bwhat bsteps bshould bbe btaken?
b- banswers1.) bCheck bservice bvalve bpositions.
2.) bCheck bthe boil blevel bin bthe brecovery bunit.
3.) bEvacuate brecovery bunit b& brecovery btank.
On brefrigeration bunits bthat buse ban bopen bcompressor; bthe b________ bis bmost blikely
bto bleak bif bthe bunit bis bnot bused bfor bseveral bmonths. b- banswersThe brotating bshaft
bseal.
Noncondensables bin ba bsystem bcause? b- banswersHigher bdischarge bpressure.
Heat bPumps bthat buse bR-410A bshould bbe bleak bchecked bwith? b-
banswersPressurized bNitrogen.
A breciprocating bcompressor bshould bnot bbe benergized bwhen? b- banswersThe
bdischarge bservice bvalve bis bclosed.
In ba brefrigeration bsystem, bthe bcomponent bdirectly bfollowing bthe bevaporator bis bthe?
b- banswersAccumulator.
Manifold bgauge bset bhoses bshould bhave bself-sealing bconnectors bor bhand bvalves
bto? b- banswersMinimize bthe brelease bof brefrigerant bwhen bthe bhoses bare bconnected
b& bdisconnected.
The bEPA bregulations brequire bthat bleaking bcommercial bor bindustrial bprocess
brefrigeration bequipment bmust bbe brepaired bwhen bthe bleak brate bexceeds b_____ bof
bthe bcharge bper byear. b- banswers35%
Moisture bis bremoved bfrom ba bsystem bby? b- banswersUsing ba bfilter bdrier.
Oil bfoaming busually boccurs bin bthe? b- banswersCompressor
R-410A bis bdifferent bfrom bother bASHRAE b400 bseries bnon-azeotropic bblends
bbecause? b- banswersR-410A bbehaves bas ba bnear bazeotropic brefrigerant, b& bcan bbe
btopped boff.
