MACS 609 CERTIFICATION Questions and
Answers| Updated
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
Answers| Updated
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
