MACS 609 CERTIFICATION / STUDY GUIDE Q-BANK / EXPERT VERIFIED ACTUAL QUESTIONS & ANSWERS FOR GUARANTEED PASS / NEWEST UPDATE

The use of ultraviolet (UV) or fluorescent dyes in an HFO-1234yf system is:



Ans: Approved by some vehicle manufactures but not by others



Quiz One effect of some refrigerant gases in the atmosphere is that they:



Ans: Contribute to trapping heat



Quiz Which item is not mentioned in the SAE J2099 Standard of refrigerant purity?



Ans: Sludge



Quiz When it has been determined that an A/C system has a low refrigerant charge, what
should be done?

, Ans: Perform a leak test procedure



Quiz Which item is not mentioned in the SAE J1991 standard of refrigerant purity?



Ans: Acid



Quiz Which of the following is unlikely to affect refrigerant charge accuracy?



Ans: A/C Compressor



Quiz CFC-12 recovery equipment has SAE 3/8-inch service fittings. HFC-134a recovery
equipment has:



Ans: Quick-couple design



Quiz What is the advantage of using refrigerant identification equipment?



Ans: Allows the ability to determine what type of refrigerant is in system



Quiz 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:



Ans: 2 minutes