1|Page
MACS 609 CERTIFICATION / STUDY GUIDE Q-BANK
/ EXPERT VERIFIED ACTUAL QUESTIONS &
ANSWERS FOR GUARANTEED PASS / NEWEST
UPDATE,
If lubricant is removed by recovery equipment during system refrigerant
removal, what must be done with the lubricant? ......ANSWER......Re-
install lubricant removed by the recovery equipment
Before reuse, what must be done with HFC-134a that has been
recovered from a mobile A/C system using recovery-only equipment?
......ANSWER......Question 2 options:
Recycle the HFC-134a before reuse using certified equipment
When can HFC-134a become combustible in a mobile air conditioning
system? ......ANSWER......If shop air is used in the system in an attempt
to check for leaks and HFC-134a is present
Which type of mobile A/C system will usually require additional time /
precautions to extract all the refrigerant? ......ANSWER......Accumulator
type
, 2|Page
Electronic leak detectors certified to SAE J2791 have the capacity of
identifying leakage rates as low as: ......ANSWER......0.15 ounces per
year
When recovery/recycling equipment is used to remove refrigerant from
a mobile A/C system, how much lubricant will be removed during the
operation? ......ANSWER......Generally, very little, if any
Why is it necessary to insure that service port caps containing good
seals are installed? ......ANSWER......To minimize refrigerant loss
Which of the following statements is correct about flushing A/C
systems? ......ANSWER......Flushing solvents may remain in A/C systems,
causing problems
When using an HFC-134a refrigerant recovery machine, after competing
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?
......ANSWER......5 minutes
Which type of tank must be used during the transfer of refrigerant?
......ANSWER......Question 10 options:
Tanks marked DOT 4BA
MACS 609 CERTIFICATION / STUDY GUIDE Q-BANK
/ EXPERT VERIFIED ACTUAL QUESTIONS &
ANSWERS FOR GUARANTEED PASS / NEWEST
UPDATE,
If lubricant is removed by recovery equipment during system refrigerant
removal, what must be done with the lubricant? ......ANSWER......Re-
install lubricant removed by the recovery equipment
Before reuse, what must be done with HFC-134a that has been
recovered from a mobile A/C system using recovery-only equipment?
......ANSWER......Question 2 options:
Recycle the HFC-134a before reuse using certified equipment
When can HFC-134a become combustible in a mobile air conditioning
system? ......ANSWER......If shop air is used in the system in an attempt
to check for leaks and HFC-134a is present
Which type of mobile A/C system will usually require additional time /
precautions to extract all the refrigerant? ......ANSWER......Accumulator
type
, 2|Page
Electronic leak detectors certified to SAE J2791 have the capacity of
identifying leakage rates as low as: ......ANSWER......0.15 ounces per
year
When recovery/recycling equipment is used to remove refrigerant from
a mobile A/C system, how much lubricant will be removed during the
operation? ......ANSWER......Generally, very little, if any
Why is it necessary to insure that service port caps containing good
seals are installed? ......ANSWER......To minimize refrigerant loss
Which of the following statements is correct about flushing A/C
systems? ......ANSWER......Flushing solvents may remain in A/C systems,
causing problems
When using an HFC-134a refrigerant recovery machine, after competing
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?
......ANSWER......5 minutes
Which type of tank must be used during the transfer of refrigerant?
......ANSWER......Question 10 options:
Tanks marked DOT 4BA
