MACS 609 CERTIFICATION |LATEST UPDATED
2026/2027 |A COMPLETE SOLUTION ALL ANSWERS
GET IT 100% CORRECT |VERIFIED BEST GRADED
A+ FOR SUCCESS
The use of ultraviolet (UV) or fluorescent dyes in an HFO-1234yf system
is:
Approved by some vehicle manufactures but not by others
One effect of some refrigerant gases in the atmosphere is that they:
Contribute to trapping heat
Which item is not mentioned in the SAE J2099 Standard of refrigerant
purity?
Sludge
When it has been determined that an A/C system has a low refrigerant
charge, what should be done?
Perform a leak test procedure
Which item is not mentioned in the SAE J1991 standard of refrigerant
purity?
Acid
Which of the following is unlikely to affect refrigerant charge accuracy?
A/C Compressor
CFC-12 recovery equipment has SAE 3/8-inch service fittings. HFC-134a
recovery equipment has:
Quick-couple design
, What is the advantage of using refrigerant identification equipment?
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:
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:
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:
Material safety data sheet (MSDS) for the chemical
To what does Global Warming Potential (GWP) refer?
Relative ability to produce global warming effect
When performing engine pre-heat for refrigerant removal, the technician
should do ALL of the following EXCEPT:
Make sure the compressor is operating
PAG lubricant:
Is hygroscopic (absorbs moisture)
Electronic leak detectors certified to SAE J2791 have the capability of
identifying leakage rates as low as:
0.15 ounce (4 grams) per year
When using an HFC-134a refrigerant recovery machine, after completing
the first recovery process, how long must you wait, then check the
2026/2027 |A COMPLETE SOLUTION ALL ANSWERS
GET IT 100% CORRECT |VERIFIED BEST GRADED
A+ FOR SUCCESS
The use of ultraviolet (UV) or fluorescent dyes in an HFO-1234yf system
is:
Approved by some vehicle manufactures but not by others
One effect of some refrigerant gases in the atmosphere is that they:
Contribute to trapping heat
Which item is not mentioned in the SAE J2099 Standard of refrigerant
purity?
Sludge
When it has been determined that an A/C system has a low refrigerant
charge, what should be done?
Perform a leak test procedure
Which item is not mentioned in the SAE J1991 standard of refrigerant
purity?
Acid
Which of the following is unlikely to affect refrigerant charge accuracy?
A/C Compressor
CFC-12 recovery equipment has SAE 3/8-inch service fittings. HFC-134a
recovery equipment has:
Quick-couple design
, What is the advantage of using refrigerant identification equipment?
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:
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:
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:
Material safety data sheet (MSDS) for the chemical
To what does Global Warming Potential (GWP) refer?
Relative ability to produce global warming effect
When performing engine pre-heat for refrigerant removal, the technician
should do ALL of the following EXCEPT:
Make sure the compressor is operating
PAG lubricant:
Is hygroscopic (absorbs moisture)
Electronic leak detectors certified to SAE J2791 have the capability of
identifying leakage rates as low as:
0.15 ounce (4 grams) per year
When using an HFC-134a refrigerant recovery machine, after completing
the first recovery process, how long must you wait, then check the
