MACS 609 CERTIFICATION WITH Q AND A ….A+GRADED..
1. If lubricant is removed by recovery equipment during system refrigerant
removal, what must be done with the lubricant?: 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?: 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?: 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 / pre-
cautions to extract all the refrigerant?: Accumulator type
5. Electronic leak detectors certified to SAE J2791 have the capacity of identify-
ing leakage rates as low as:: 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?: Generally, very little, if any
7. Why is it necessary to insure that service port caps containing good seals are
installed?: To minimize refrigerant loss
8. Which of the following statements is correct about flushing A/C systems?: -
Flushing solvents may remain in A/C systems, causing problems
9. When using an HFC-134a refrigerant recovery machine, after competing the
first recovery process, how long must you wait, then check the machine's
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1. If lubricant is removed by recovery equipment during system refrigerant
removal, what must be done with the lubricant?: 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?: 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?: 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 / pre-
cautions to extract all the refrigerant?: Accumulator type
5. Electronic leak detectors certified to SAE J2791 have the capacity of identify-
ing leakage rates as low as:: 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?: Generally, very little, if any
7. Why is it necessary to insure that service port caps containing good seals are
installed?: To minimize refrigerant loss
8. Which of the following statements is correct about flushing A/C systems?: -
Flushing solvents may remain in A/C systems, causing problems
9. When using an HFC-134a refrigerant recovery machine, after competing the
first recovery process, how long must you wait, then check the machine's
1/3
