MACS 609 CERTIFICATION

MACS 609 CERTIFICATION

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] 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

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 completing the first recovery process, how long must you wait, then check the machine's gauges for a rise in pressure above vacuum, which would indicate that the system still contains some refrigerant?

• [ANSWER] 5 minutes

Which type of tank must be used during the transfer of refrigerant?

• [ANSWER] Tanks marked DOT 4BA

When it has been determined that an A/C system has a low refrigerant charge, what should be done?

• [ANSWER] Perform a leak detection procedure
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