Section 609 Questions and Answers Already Passed

Section 609 Questions and Answers Already Passed Which of the following is not a true factor in how much refrigerant can be recovered from a A/C system? The age of the vehicle Why is it important to make sure that the service port caps are not damaged when reinstalling them? To minimize refrigerant loss What must be done with the lubricant once it is removed by the recovery equipment? Dispose of it in accordance with federal, state, local requirements What types of vehicles can HFO-1234yf be used in? Any light vehicle with an air conditioning system designed to use it SAE standard J2791 electronic leak detectors requires improved standards to have the capability to identifying leakage rates as low as: 0.15 ounces per year Which of the following statements are true about flushing A/C systems? Flushing solvents may remain in A/C systems, causing problems Before it can be reused, the refrigerant must be recycled through use of a mobile A/C system using recovery-only equipment. Recycle the HFC-134a before reuse using certified equipment What is "acceptable" classification of HFO-1234yf according to the U.S. EPA? The refrigerant may only be used in new vehicles with components specifically designed for it How much lubricant will be removed when using a recovery/recycling equipment to remove refrigerant from a mobile A/C system? Generally, very little, if any What type of mobile A/C system will require more time and precautions to extract all the refrigerant? Accumulator type What are the recommendations when using ultra-violet (UV) or fluorescent dyes in an HFO-1234yf system? Approved by some vehicle manufactures but not by others What should be done when it has been determined that an A/C has a low refrigerant charge? Perform a leak detection procedure What must be registered with the EPA according to Section 609 of the Clean Air Act? Must be registered with the EPA What will happen if mixing CFC-12 and HFC-134a in the same system? Result in refrigerant cross contamination What is the recommendation when recycling equipment filters should be changed? According to equipment manufacturer's specifications When recovering refrigerant from any A/C system for the first recovery process, how long should you wait to check A/C system pressure? 5 minutes Why is it important to check for air when refrigerant is recycled? To avoid performance loss, system damage What should you do when pressure has risen above vacuum after the first recovery? Repeat the recovery process During a standard evacuation, how much moisture is removed from a mobile A/C system? Possibly none When performing an engine pre-heat for the removal of refrigerant, the technician must do all of the following with the exception of: Make sure the compressor is operating What is a PAG lubricant? Is hygroscopic (absorbs moisture) What is the positive point in using refrigerant identification equipment? Allows the ability to determine what type of refrigerant is in the system What is the first step that a technician should do when servicing a A/C system? Perform a visual inspection When transferring refrigerant, what type of tank must be used? Tanks marked DOT 4BA In order to recover/recharge refrigerant from an HFO-1234yf system, what would a shop need? A new recovery, recycling and recharging machine