MACS 609 CERTIFICATION questions
with correct answers
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
When recovery/recycling equipment is used to remove refrigerant from a mobile
A/C system, 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
with correct answers
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
When recovery/recycling equipment is used to remove refrigerant from a mobile
A/C system, 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
