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MACS 609 CERTIFICATION EXAM QUESTIONS & ANSWERS CORRECT 100% The use of ultraviolet (UV) or fluorescent dyes in an HFO-1234yf system is: - answers Approved by some vehicle manufactures but not by others One effect of some refrigerant gases in the atmosphere is that they: - answers Contribute to trapping heat Which item is not mentioned in the SAE J2099 Standard of refrigerant purity? - answers Sludge When it has been determined that an A/C system has a low refrigerant charge, what s...

MACS 609 CERTIFICATION Exam Questions And Well Elaborated Solutions If lubricant is removed by recovery equipment during system refrigerant removal, what must be done with the lubricant? - answers 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? - answers Question 2 options: Recycle the HFC-134a before reuse using certified equipment When can HFC-134a be...