10/13/25, 8:12
PM
MACS 609 CERTIFICATION EXAM QUESTIONS
WITH VERIFIED ANSWERS GRADED A+
Terms in this set (63)
The use of ultraviolet (UV) or Approved by some vehicle manufactures but not by others
fluorescent dyes in an HFO-1234yf
system is:
One effect of some refrigerant gases Contribute to trapping heat
in the atmosphere is that they:
Which item is not mentioned in the Sludge
SAE J2099 Standard of refrigerant
purity?
1/
, 10/13/25, 8:12
PM
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 the Acid
SAE J1991 standard of refrigerant
purity?
Which of the following is unlikely to A/C Compressor
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:
2/
PM
MACS 609 CERTIFICATION EXAM QUESTIONS
WITH VERIFIED ANSWERS GRADED A+
Terms in this set (63)
The use of ultraviolet (UV) or Approved by some vehicle manufactures but not by others
fluorescent dyes in an HFO-1234yf
system is:
One effect of some refrigerant gases Contribute to trapping heat
in the atmosphere is that they:
Which item is not mentioned in the Sludge
SAE J2099 Standard of refrigerant
purity?
1/
, 10/13/25, 8:12
PM
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 the Acid
SAE J1991 standard of refrigerant
purity?
Which of the following is unlikely to A/C Compressor
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:
2/
