MACS 609 – CERTIFICATION EXAM PRETEST QUESTIONS WITH VERIFIED ANSWERS

MACS 609 – CERTIFICATION EXAM PRETEST QUESTIONS WITH VERIFIED ANSWERS The age of the vehicle - ANSWER Which of the following is not a true factor in how much refrigerant can be recovered from a A/C system? To minimize refrigerant loss - ANSWER Why is it important to make sure that the service port caps are not damaged when reinstalling them? Dispose of it in accordance with federal, state, local requirements - ANSWER What must be done with the lubricant once it is removed by the recovery equipment? Any light vehicle with an air conditioning system designed to use it - ANSWER What types of vehicles can HFO1234yf be used in? 0.15 ounces per year - ANSWER SAE standard J2791 electronic leak detectors requires improved standards to have the capability to identifying leakage rates as low as: Flushing solvents may remain in A/C systems, causing problems - ANSWER Which of the following statements are true about flushing A/C systems? Recycle the HFC-134a before reuse using certified equipment - ANSWER Before it can be reused, the refrigerant must be recycled through use of a mobile A/C system using recovery-only equipment. The refrigerant may only be used in new vehicles with components specifically designed for it - ANSWER What is "acceptable" classification of HFO-1234yf according to the U.S. EPA? Generally, very little, if any - ANSWER How much lubricant will be removed when using a recovery/recycling equipment to remove refrigerant from a mobile A/C system? Accumulator type - ANSWER What type of mobile A/C system will require more time and precautions to extract all the refrigerant? Approved by some vehicle manufactures but not by others - ANSWER What are the recommendations when using ultra-violet (UV) or fluorescent dyes in an HFO1234yf system? Perform a leak detection procedure - ANSWER What should be done when it has been determined that an A/C has a low refrigerant charge? Must be registered with the EPA - ANSWER What must be registered with the EPA according to Section 609 of the Clean Air Act? Result in refrigerant cross contamination - ANSWER What will happen if mixing CFC-12 and HFC-134a in the same system? According to equipment manufacturer's specifications - ANSWER What is the recommendation when recycling equipment filters should be changed? 5 minutes - ANSWER When recovering refrigerant from any A/C system for the first recovery process, how long should you wait to check A/C system pre