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Exam (elaborations)

MACS 609 CERTIFICATION questions with correct answers

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If lubricant is removed by recovery equipment during system refrigerant removal, what must be done with the lubricant? - Answer Re-install lubricant removed by the recovery equipment Before reuse, what must be done with HFC-134a that has been recovered from a mobile A/C system using recovery-only equipment? - Answer Question 2 options: Recycle the HFC-134a before reuse using certified equipment

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MACS 609 CERTIFICATION questions ff ff ff




ff with correct answers ff ff




1. If flubricant fis fremoved fby frecovery fequipment fduring fsystem frefrigerant fremoval,fwhat
ff ff ff ff ff ff ff ff ff ff f




fmust fbe fdone fwith fthe flubricant…ANSWER>>>>>fRe-install flubricant fremoved fby fthe frecovery
f ff ff f f ff f f f ff ff




ff fequipment

2. Before freuse, fwhat fmust fbe fdone fwith fHFC-134a fthat fhas fbeen frecovered ffrom fa fmobile
ff ff ff ff ff ff ff ff ff ff ff ff ff ff




fA/C fsystem fusing frecovery-only fequipment?
ff ff ff ff ff




ff …ANSWER>>>>>fQuestion f2 foptions: fRecycle fthe fHFC-134a fbefore freuse fusing fcertified fequipment f f ff ff ff ff ff ff ff ff




3. When fcan fHFC-134a fbecome fcombustible fin fa fmobile fair fconditioning fsys- ftem?
ff ff ff ff ff ff ff ff ff ff ff




ff …ANSWER>>>>>IffshopfairfisfusedfinfthefsystemfinfanfattemptftofcheckfforfleaksfandfHFC-134a fis fpresent
f f f f f f f f f f f f f f f f ff ff




4. Which ftype fof fmobile fA/C fsystem fwill fusually frequire fadditional ftime f/ fprecautions
ff ff ff ff ff ff ff ff ff ff ff ff




ff fto fextract fall fthe frefrigerant?
ff ff ff ff




…ANSWER>>>>>Accumulator ftype ff




5. Electronic fleak fdetectors fcertified fto fSAE fJ2791 fhave fthe fcapacity fof fiden- ftifying fleakage
ff ff ff ff ff ff ff ff ff ff ff ff ff




ff frates fas flow fas
ff ff ff ff




…ANSWER>>>>>f0.15 founces fper fyear ff ff ff




1 fff/
fff5

, 6. When frecovery/recycling fequipment fis fused fto fremove frefrigerant ffrom fa fmobile fA/C
ff ff ff ff ff ff ff ff ff ff ff




ff fsystem, fhow fmuch flubricant fwill fbe fremoved fduring fthe fopera- ftion?
ff ff ff ff ff ff ff ff ff ff




ff …ANSWER>>>>>Generally, fvery flittle, fif fany ff ff ff ff




7. Why fis fit fnecessary fto finsure fthat fservice fport fcaps fcontaining fgood fseals fare finstalled?
ff ff ff ff ff ff ff ff ff ff ff ff ff ff




f…ANSWER>>>>>To fminimize frefrigerant floss ff ff ff




8. Which fof fthe ffollowing fstatements fis fcorrect fabout fflushing fA/C fsystems?-
ff ff ff ff ff ff ff ff ff ff




…ANSWER>>>>>fFlushing fsolvents fmay fremain fin fA/C fsystems, fcausing fproblems ff ff ff ff ff ff ff ff




9. Whenfusingfan fHFC-134a frefrigerant frecovery fmachine,fafter fcompeting fthe ffirst frecovery
f f f f f f f f f ff ff




ff fprocess, fhow flong fmust fyou fwait, fthen fcheck fthe fmachine's fgauges ffor fa frise fin fpressure
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff




ff fabove fvacuum, fwhich fwould findicate fthat fthe fsystem fstill fcontains fsome frefrigerant?
ff ff ff ff ff ff ff ff ff ff ff




ff …ANSWER>>>>>f5 fminutes ff




10. Which ftype fof ftank fmust fbe fused fduring fthe ftransfer fof frefrigerant?
ff ff ff ff ff ff ff ff ff ff ff




ff …ANSWER>>>>>fQues- ftion f10 foptions: ff ff ff




Tanks fmarked fDOT f4BA
f f f




11. When fit fhas fbeen fdetermined fthat fan fA/C fsystem fhas fa flow frefrigerant fcharge, fwhat
ff ff ff ff ff ff ff ff ff ff ff ff ff ff




ff fshould fbe fdone?
ff ff




ff …ANSWER>>>>>Perform fa fleak fdetection fprocedure ff ff ff ff




12. One feffect fof fsome frefrigerant fgases fin fthe fatmosphere fis fthat fthey
ff ff ff ff ff ff ff ff ff ff ff


2 fff/
fff5

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