MACS 609 CERTIFICATION WITH
DETAILED QUESTIONS AND
VERIFIED ANSWERS
{GUARANTEED PASS AND MACS
TEST |LATEST UPDATE!!!
The use of ultraviolet (UV) or fluorescent dyes in an HFO-1234yf system is: -
............ANSWER.............. Approved by some vehicle manufactures but not by
others
One effect of some refrigerant gases in the atmosphere is that they: -
............ANSWER.............. Contribute to trapping heat
Which item is not mentioned in the SAE J2099 Standard of refrigerant purity? -
............ANSWER.............. Sludge
When it has been determined that an A/C system has a low refrigerant charge, what
should be done? - ............ANSWER.............. Perform a leak test procedure
Which item is not mentioned in the SAE J1991 standard of refrigerant purity? -
............ANSWER.............. Acid
Which of the following is unlikely to affect refrigerant charge accuracy? -
............ANSWER.............. A/C Compressor
CFC-12 recovery equipment has SAE 3/8-inch service fittings. HFC-134a recovery
equipment has: - ............ANSWER.............. Quick-couple design
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, What is the advantage of using refrigerant identification equipment? -
............ANSWER.............. Allows the ability to determine what type of refrigerant
is in system
If an HFC-134a A/C system still has 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: -
............ANSWER.............. 2 minutes
Paid technicians who service or repair buses using HCFC-22 as refrigerant, and/or
service or repair aircraft or ship/boat cargo refrigeration equipment: -
............ANSWER.............. Must be Section 608 Type II Certified
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
To what does Global Warming Potential (GWP) refer? -
............ANSWER.............. Relative ability to produce global warming effect
When performing engine pre-heat for refrigerant removal, the technician should do
ALL of the following EXCEPT: - ............ANSWER.............. Make sure the
compressor is operating
PAG lubricant: - ............ANSWER.............. Is hygroscopic (absorbs moisture)
Electronic leak detectors certified to SAE J2791 have the capability of identifying
leakage rates as low as: - ............ANSWER.............. 0.15 ounce (4 grams) per year
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DETAILED QUESTIONS AND
VERIFIED ANSWERS
{GUARANTEED PASS AND MACS
TEST |LATEST UPDATE!!!
The use of ultraviolet (UV) or fluorescent dyes in an HFO-1234yf system is: -
............ANSWER.............. Approved by some vehicle manufactures but not by
others
One effect of some refrigerant gases in the atmosphere is that they: -
............ANSWER.............. Contribute to trapping heat
Which item is not mentioned in the SAE J2099 Standard of refrigerant purity? -
............ANSWER.............. Sludge
When it has been determined that an A/C system has a low refrigerant charge, what
should be done? - ............ANSWER.............. Perform a leak test procedure
Which item is not mentioned in the SAE J1991 standard of refrigerant purity? -
............ANSWER.............. Acid
Which of the following is unlikely to affect refrigerant charge accuracy? -
............ANSWER.............. A/C Compressor
CFC-12 recovery equipment has SAE 3/8-inch service fittings. HFC-134a recovery
equipment has: - ............ANSWER.............. Quick-couple design
1|Page
, What is the advantage of using refrigerant identification equipment? -
............ANSWER.............. Allows the ability to determine what type of refrigerant
is in system
If an HFC-134a A/C system still has 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: -
............ANSWER.............. 2 minutes
Paid technicians who service or repair buses using HCFC-22 as refrigerant, and/or
service or repair aircraft or ship/boat cargo refrigeration equipment: -
............ANSWER.............. Must be Section 608 Type II Certified
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
To what does Global Warming Potential (GWP) refer? -
............ANSWER.............. Relative ability to produce global warming effect
When performing engine pre-heat for refrigerant removal, the technician should do
ALL of the following EXCEPT: - ............ANSWER.............. Make sure the
compressor is operating
PAG lubricant: - ............ANSWER.............. Is hygroscopic (absorbs moisture)
Electronic leak detectors certified to SAE J2791 have the capability of identifying
leakage rates as low as: - ............ANSWER.............. 0.15 ounce (4 grams) per year
2|Page
