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MACS 609 CERTIFICATION Questions and Answers (2024 / 2025) (Verified Answers)
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MACS 609 CERTIFICATION Questions and Answers (2024 / 2025) (Verified Answers)
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MACS 609 CERTIFICATION EXAM1. If lubricant is removed by recovery equipment during system refrigerant
removal, what must be done with the lubricant?
ANS Re-install lubricant removed by the recovery equipment
2. Before reuse, what must be done with HFC-134a that has been recovered
from a mobile A/C system using recovery-only equipment?
ANS Question 2 options
Recycle the HFC-134a before reuse using certified equipment
3. When can HFC-134a become combustible in a mobile air conditioning sys-
tem?
ANS If shop air is used in the system in an attempt to check for leaks
and HFC-134a is present
4. Which type of mobile A/C system will usually require additional time
/ precautions to extract all the refrigerant?
1/2
, ANS Accumulator type
5. Electronic leak detectors certified to SAE J2791 have the capacity of
iden- tifying leakage rates as low as
ANS 0.15 ounces per year
6. When recovery/recycling equipment is used to remove refrigerant from
a mobile A/C system, how much lubricant will be removed during the
opera- tion?
ANS Generally, very little, if any
7. Why is it necessary to insure that service port caps containing good seals
are installed?
ANS To minimize refrigerant loss
8. Which of the following statements is correct about flushing A/C
systems?-
ANS Flushing solvents may remain in A/C systems, causing problems
2/2
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