MAC 609 CERTIFICATION QUESTIONS AND ANSWERS (100%
CORRECT) LATEST 2025
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
When can HFC-134a become combustible in a mobile air conditioning system? - (ANSWER)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? - (ANSWER)Accumulator type
Electronic leak detectors certified to SAE J2791 have the capacity of identifying leakage rates as
low as: - (ANSWER)0.15 ounces per year
你是想要一篇“眼睛容易阅读的”
中文文章，还是一篇关于“眼睛”
When recovery/recycling equipment is used to remove refrigerant from a mobile A/C system,
主题的中文文章？
how much lubricant will be removed during the operation? - (ANSWER)Generally, very little, if
any
Why is it necessary to insure that service port caps containing good seals are installed? -
(ANSWER)To minimize refrigerant loss
Which of the following statements is correct about flushing A/C systems? - (ANSWER)Flushing
solvents may remain in A/C systems, causing problems
When using an HFC-134a refrigerant recovery machine, after competing the first recovery
process, how long must you wait, then check the machine's gauges for a rise in pressure above
CORRECT) LATEST 2025
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
When can HFC-134a become combustible in a mobile air conditioning system? - (ANSWER)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? - (ANSWER)Accumulator type
Electronic leak detectors certified to SAE J2791 have the capacity of identifying leakage rates as
low as: - (ANSWER)0.15 ounces per year
你是想要一篇“眼睛容易阅读的”
中文文章，还是一篇关于“眼睛”
When recovery/recycling equipment is used to remove refrigerant from a mobile A/C system,
主题的中文文章？
how much lubricant will be removed during the operation? - (ANSWER)Generally, very little, if
any
Why is it necessary to insure that service port caps containing good seals are installed? -
(ANSWER)To minimize refrigerant loss
Which of the following statements is correct about flushing A/C systems? - (ANSWER)Flushing
solvents may remain in A/C systems, causing problems
When using an HFC-134a refrigerant recovery machine, after competing the first recovery
process, how long must you wait, then check the machine's gauges for a rise in pressure above
