MACS 609 Certification Test
Questions And Correct Answers
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
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
When can HFC-134a become combustible in a mobile air conditioning system?
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?
Accumulator type
, Electronic leak detectors certified to SAE J2791 have the capacity of identifying
leakage rates as low as:
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?
Generally, very little, if any
Why is it necessary to insure that service port caps containing good seals are
installed?
To minimize refrigerant loss
Which of the following statements is correct about flushing A/C systems?
Flushing solvents may remain in A/C systems, causing problems
Specific safety information for managing incidents involving refrigerants and
other chemicals (inhalation, spills, fires, etc) is found in the:
Material safety data sheet (MSDS) for the chemical
Questions And Correct Answers
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
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
When can HFC-134a become combustible in a mobile air conditioning system?
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?
Accumulator type
, Electronic leak detectors certified to SAE J2791 have the capacity of identifying
leakage rates as low as:
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?
Generally, very little, if any
Why is it necessary to insure that service port caps containing good seals are
installed?
To minimize refrigerant loss
Which of the following statements is correct about flushing A/C systems?
Flushing solvents may remain in A/C systems, causing problems
Specific safety information for managing incidents involving refrigerants and
other chemicals (inhalation, spills, fires, etc) is found in the:
Material safety data sheet (MSDS) for the chemical
