MACS 609 CERTIFICATION EXAM
QUESTIONS AND ANSWERS 2026
VERIFIED.
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
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
When can HFC-134a become combustible in a mobile air conditioning system? - ANS If shop
air is used in the system in an attempt to check for leaks and HFC-134a is present
Which type of mobile A/C system will usually require additional time / precautions to extract all
the refrigerant? - ANS Accumulator type
Electronic leak detectors certified to SAE J2791 have the capacity of identifying leakage rates as
low as: - ANS 0.15 ounces per year
When recovery/recycling equipment is used to remove refrigerant from a mobile A/C system,
how much lubricant will be removed during the operation? - ANS Generally, very little, if any
@2026/2027 ALLRIGHTS RESERVED.
QUESTIONS AND ANSWERS 2026
VERIFIED.
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
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
When can HFC-134a become combustible in a mobile air conditioning system? - ANS If shop
air is used in the system in an attempt to check for leaks and HFC-134a is present
Which type of mobile A/C system will usually require additional time / precautions to extract all
the refrigerant? - ANS Accumulator type
Electronic leak detectors certified to SAE J2791 have the capacity of identifying leakage rates as
low as: - ANS 0.15 ounces per year
When recovery/recycling equipment is used to remove refrigerant from a mobile A/C system,
how much lubricant will be removed during the operation? - ANS Generally, very little, if any
@2026/2027 ALLRIGHTS RESERVED.
