MACS 609 CERTIFICATION Exam with complete solution If lubricant is removed by recovery equipment during system refrigerant removal, what must be done with the lubricant? -answerRe-instal ubricant removed by the recovery equipment Before reuse,

MACS 609 CERTIFICATION Exam with complete solution If lubricant is removed by recovery equipment during system refrigerant removal, what must be done with the lubricant? -answerRe-instal ubricant 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 recoveryonly equipment? answerQuestion 2 options: Recyce the HFC-134a before reuse using certified equipment When can HFC-134a become combustible in amobile air conditioning system? -answerIf shop air is used in the system in an attempt to check for leaks and HFC134a is present Which type of mobile A/C system wil usually require additional time / precautions to extract all the refrigerant? -answerAccumulator type Electronic leak detectors certified to SAE J2791 have the capacity of identifying leakage rates as low as: -answer0.15 ounces per year When recovery/recycling equipment is used to remove refrigerant from a mobile A/C system, how much lubricant wil be removed during the operation? -answerGenerally, very little, if any Why is it necessary to insure that service port caps containing good seals are installed? -answerTo minimize refrigerant loss Which of the following statements is correct about flushing A/C systems? -answerFlushing solvents may remain in A/C systems, causing problems When using an HFC134a 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? answer5 minutes Which type of tank must be used during the transfer of refrigerant? answerQuestion 10 options: Tanks marked DOT 4BA When it has been determined that an A/C system has a ow refrigerant charge, what should be done? -answerPerform a leak detection procedure