MACS 609 CERTIFICATION questions with
verified correct answers
, 1. 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
2. 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:Answer: Recycle the HFC-134a before reuse using certified equipment
3. When can HFC-134a become combustible in a mobile air conditioning sys-
tem?:Answer: 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?:Answer: Accumulator type
5. Electronic leak detectors certified to SAE J2791 have the capacity of iden-
tifying leakage rates as low as:Answer::Answer: 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?:Answer: Generally, very little, if any
7. Why is it necessary to insure that service port caps containing good seals
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verified correct answers
, 1. 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
2. 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:Answer: Recycle the HFC-134a before reuse using certified equipment
3. When can HFC-134a become combustible in a mobile air conditioning sys-
tem?:Answer: 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?:Answer: Accumulator type
5. Electronic leak detectors certified to SAE J2791 have the capacity of iden-
tifying leakage rates as low as:Answer::Answer: 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?:Answer: Generally, very little, if any
7. Why is it necessary to insure that service port caps containing good seals
1/3
