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Exam (elaborations)

MACS 609 CERTIFICATION QUESTIONS AND CORRECT VERIFIED ANSWERS

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MACS 609 CERTIFICATION QUESTIONS AND CORRECT VERIFIED ANSWERS

Institution
MACS
Course
MACS

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MACS 609 CERTIFICATION QUESTIONS
AND CORRECT VERIFIED ANSWERS
IfA2lubricantA2isA2removedA2byA2recoveryA2equipmentA2duringA2systemA2refrigerantA2remov
al,A2whatA2mustA2beA2doneA2withA2theA2lubricant?A2-A2Ans--Re-
installA2lubricantA2removedA2byA2theA2recoveryA2equipment

BeforeA2reuse,A2whatA2mustA2beA2doneA2withA2HFC-
134aA2thatA2hasA2beenA2recoveredA2fromA2aA2mobileA2A/CA2systemA2usingA2recovery-
onlyA2equipment?A2-A2Ans--QuestionA22A2options:
RecycleA2theA2HFC-134aA2beforeA2reuseA2usingA2certifiedA2equipment

WhenA2canA2HFC-
134aA2becomeA2combustibleA2inA2aA2mobileA2airA2conditioningA2system?A2-A2Ans--
IfA2shopA2airA2isA2usedA2inA2theA2systemA2inA2anA2attemptA2toA2checkA2forA2leaksA2andA2HF
C-134aA2isA2present

WhichA2typeA2ofA2mobileA2A/CA2systemA2willA2usuallyA2requireA2additionalA2timeA2/
A2precautionsA2toA2extractA2allA2theA2refrigerant?A2-A2Ans--AccumulatorA2type


ElectronicA2leakA2detectorsA2certifiedA2toA2SAEA2J2791A2haveA2theA2capacityA2ofA2identifyi
ngA2leakageA2ratesA2asA2lowA2as:A2-A2Ans--0.15A2ouncesA2perA2year

WhenA2recovery/
recyclingA2equipmentA2isA2usedA2toA2removeA2refrigerantA2fromA2aA2mobileA2A/
CA2system,A2howA2muchA2lubricantA2willA2beA2removedA2duringA2theA2operation?A2-A2Ans--
Generally,A2veryA2little,A2ifA2any

WhyA2isA2itA2necessaryA2toA2insureA2thatA2serviceA2portA2capsA2containingA2goodA2sealsA2a
reA2installed?A2-A2Ans--ToA2minimizeA2refrigerantA2loss

WhichA2ofA2theA2followingA2statementsA2isA2correctA2aboutA2flushingA2A/CA2systems?A2-
A2Ans--FlushingA2solventsA2mayA2remainA2inA2A/CA2systems,A2causingA2problems


WhenA2usingA2anA2HFC-
134aA2refrigerantA2recoveryA2machine,A2afterA2competingA2theA2firstA2recoveryA2process,A
2howA2longA2mustA2youA2wait,A2thenA2checkA2theA2machine'sA2gaugesA2forA2aA2riseA2inA2pr
essureA2aboveA2vacuum,A2whichA2wouldA2indicateA2thatA2theA2systemA2stillA2containsA2so
meA2refrigerant?A2-A2Ans--5A2minutes

WhichA2typeA2ofA2tankA2mustA2beA2usedA2duringA2theA2transferA2ofA2refrigerant?A2-A2Ans--
QuestionA210A2options:
TanksA2markedA2DOTA24BA
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Uploaded on
June 29, 2026
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2025/2026
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