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MACS 609 CERTIFICATION EXAM VERIFIED 2024
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MACS 609 CERTIFICATION EXAM VERIFIED 2024
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MACS 609 CERTIFICATION EXAM VERIFIED 2024Before 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
Electronic leak detectors certified to SAE J2791 have the capacity of identifying leakage
rates as low as: - ANSWER-0.15 ounces per year
HFO-1234yf can be used in: - ANSWER-Any light vehicle with an air conditioning
system designed to use it
HFO-1234yf is classified as "A2L-mildly flammable." This means: - ANSWER-It can
ignite under certain circumstances
How much moisture is removed from a mobile A/C system during a typical evacuation?
- ANSWER-Possibly none
If a large amount of lubricant is removed from a system during refrigerant recovery: -
ANSWER-The system likely contained too much lubricant
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
Mixing CFC-12 and HFC-134a in the same system will: - ANSWER-Result in refrigerant
cross contamination
One effect of some refrigerant gases in the atmosphere is that they: - ANSWER-
Contribute to trapping heat
PAG lubricant: - ANSWER-Is hygroscopic (absorbs moisture)
Paid technicians who service or repair mobile A/C systems using HFC-22 as refrigerant,
or service cargo refrigeration equipment: - ANSWER-Must be Section 608 Type II
certified
Section 609 of the Clean Air Act requires that recovery/recycling equipment: -
ANSWER-Must be registered with the EPA
Specific safety information for managing incidents involving refrigerants and other
chemicals (inhalation, spills, fires, etc) is found in the: - ANSWER-Material safety data
sheet (MSDS) for the chemical
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