MACS 609 CERTIFICATION EXAM QUESTIONS AND ANSWERS
(VERIFIED ANSWERS) (LATEST UPDATE 2025) UPDATE!!
One effect of some refrigerant Contribute to trapping heat
gases in the atmosphere is that
they:
Which item is not mentioned in Sludge
the SAE J2099 Standard of
refrigerant purity?
When it has been determined Perform a leak test procedure
that an A/C system has a low
refrigerant charge, what should
be done?
Which item is not mentioned in Acid
the SAE J1991 standard of
refrigerant purity?
Which of the following is unlikely A/C Compressor
to affect refrigerant charge
accuracy?
CFC-12 recovery equipment has Quick-couple design
SAE 3/8- inch service fittings.
HFC-134a recovery equipment
has:
What is the advantage of using Allows the ability to determine what type of refrigerant is in system
refrigerant identification
equipment?
If an HFC-134a A/C system still has 2 minutes
pressure after the first refrigerant
recovery process is complete
(including the five-
minute pause), additional recovery
is
necessary until the system vacuum
level remains stable for:
Paid technicians who service or Must be Section 608 Type II Certified
repair buses using HCFC-22 as
refrigerant, and/or service or
repair aircraft or ship/boat cargo
, refrigeration equipment:
Specific safety information for Material safety data sheet (MSDS) for the chemical
managing incidents involving
refrigerants and other chemicals
(inhalation, spills, fires, etc.) is
found in the:
To what does Global Warming Relative ability to produce global warming effect
Potential (GWP) refer?
When performing engine pre-heat Make sure the compressor is operating
for
refrigerant removal, the
technician should do ALL of the
following EXCEPT:
PAG lubricant: Is hygroscopic (absorbs moisture)
Electronic leak detectors certified 0.15 ounce (4 grams) per year
to SAE J2791 have the
capability of identifying leakage
rates as low as:
When using an HFC-134a 5 minutes
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?
(VERIFIED ANSWERS) (LATEST UPDATE 2025) UPDATE!!
One effect of some refrigerant Contribute to trapping heat
gases in the atmosphere is that
they:
Which item is not mentioned in Sludge
the SAE J2099 Standard of
refrigerant purity?
When it has been determined Perform a leak test procedure
that an A/C system has a low
refrigerant charge, what should
be done?
Which item is not mentioned in Acid
the SAE J1991 standard of
refrigerant purity?
Which of the following is unlikely A/C Compressor
to affect refrigerant charge
accuracy?
CFC-12 recovery equipment has Quick-couple design
SAE 3/8- inch service fittings.
HFC-134a recovery equipment
has:
What is the advantage of using Allows the ability to determine what type of refrigerant is in system
refrigerant identification
equipment?
If an HFC-134a A/C system still has 2 minutes
pressure after the first refrigerant
recovery process is complete
(including the five-
minute pause), additional recovery
is
necessary until the system vacuum
level remains stable for:
Paid technicians who service or Must be Section 608 Type II Certified
repair buses using HCFC-22 as
refrigerant, and/or service or
repair aircraft or ship/boat cargo
, refrigeration equipment:
Specific safety information for Material safety data sheet (MSDS) for the chemical
managing incidents involving
refrigerants and other chemicals
(inhalation, spills, fires, etc.) is
found in the:
To what does Global Warming Relative ability to produce global warming effect
Potential (GWP) refer?
When performing engine pre-heat Make sure the compressor is operating
for
refrigerant removal, the
technician should do ALL of the
following EXCEPT:
PAG lubricant: Is hygroscopic (absorbs moisture)
Electronic leak detectors certified 0.15 ounce (4 grams) per year
to SAE J2791 have the
capability of identifying leakage
rates as low as:
When using an HFC-134a 5 minutes
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?
