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
, MACS 609 CERTIFICATION questions with correct
answers
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
competing 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-Question 10 options:
Tanks marked DOT 4BA
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
, MACS 609 CERTIFICATION questions with correct
answers
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
competing 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-Question 10 options:
Tanks marked DOT 4BA
