MACS 609 SET EXAMINERS QUESTIONS AND
ANSWERS SURE A+
✔✔When recovery/recycling equipment is used to remove refrigerant from a mobile A/C
system, how much lubricant will be removed during the operation? - ✔✔Generally, very
little, if any
✔✔Why is it necessary to insure that service port caps containing good seals are
installed? - ✔✔To minimize refrigerant loss
✔✔Which of the following statements is correct about flushing A/C systems? -
✔✔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? - ✔✔5 minutes
✔✔Which type of tank must be used during the transfer of refrigerant? - ✔✔Question 10
options:
Tanks marked DOT 4BA
ANSWERS SURE A+
✔✔When recovery/recycling equipment is used to remove refrigerant from a mobile A/C
system, how much lubricant will be removed during the operation? - ✔✔Generally, very
little, if any
✔✔Why is it necessary to insure that service port caps containing good seals are
installed? - ✔✔To minimize refrigerant loss
✔✔Which of the following statements is correct about flushing A/C systems? -
✔✔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? - ✔✔5 minutes
✔✔Which type of tank must be used during the transfer of refrigerant? - ✔✔Question 10
options:
Tanks marked DOT 4BA
