Type II Refrigerant Handling - Leak Detection & Recovery Procedures

TYPE II Question 1. When first inspecting hermetic system known to be leaking, you should look for, 2. Which part of a belt driven non-hermetic compressor is most likely to leak if the compressor is not been used for several months, 3. Starting in 2019, what rate triggers the EPA requirement that the refrigement containing 50 pounds or more of R-22 be repaired, 4. After a leak repair of a supermarket rack using 3000lbs of R-22 and a sucessful initial verification test, when must a follow up leak verification test be conducted, 5. An initial leak verification test failed after repairing a leak in a rack refrigeration system for a supermarket using an HCFC refrigerant . What would be the next step, 6. When recovery is first started, at what phase is the refrigerant removed to save recovery time, 7. Where must you connect the hose in order to recover liquid refrigerant, 8. Recovering refrigerant from a system in the vapor phase will minimize the loss of which of the following, 9. After refrigerant liquid has been recovered from the appliance, any remaining vapor, 10. How can speed up the removal of the refrigerant charge from a system, 11. Why could a recycling or recovery machine that uses a hermetic compressor overheat when drawing deep vaccum, 12. Your recovery/recycling machine has R-22 refrigerant in it. you now have to recover refrigerant from an R-410A unit. What must be done before recovery, 13. Which of the following statements about recycling and recovery equipment is false? 14. You are changing out of the compressor of a system containing 40 pounds of R-404A. In addition isolating the compressor , which of the following procedures should you follow, 15. What should be done after reaching the required recovery vacuum on an appliance, 16. Before making a major repair, technicians must evacuate an appliance or component containing more then 200 pounds of R410A to which of the following levels, 17. When can appliances containing refrigerants be recovered to atmospheric pressure, 18. Which of the following repairs would always be consider"major" under EPA regulations, 19. When is it against EPA regulations to use system-dependent recovery equipment, 20. What is the state of the refrigerant leaving the receiver in a refrigeration system, 21. Identify the best method to charge a system that has both an air-cooled condenser and evaporator with a name plate charge of 80 pounds. 22. How would you remove moisture from refrigerant in a system. 23. For what refrigerant is an equipment room refrigerant detector not require ASHRAE Standard 15 provided the Answer D. Traces of oil B. Rotating shaft seal. B. 20% C. Within 10 days B. Conduct additional repairs within 30 day repair window or mothball the appliance. C. Liquid phase C. Liquid line B. oil D. removed by the recovery system. B. Cooling the recovery cylinder to lower its pressure. B. The motor relies on the flow of refrigerant through the compressor for cooling. D. remove the R-22 from recovery unit and change the filter. B. Purchases of such equipment must be reported to the EPA. C. Evacuate the isolated section of the system to 0 psig, and if system pressure does not rise after a few mins, remove the compressor B. Wait for at least a few mins to see if the system pressure rises. C. 10 inches of Hg vacuum C. Leaks in the appliance make recovery to the prescribed level unattainable. A. Replacement of an evaporator coil. C. When the appliance contains over 15 pounds of refrigerant. C. High pressure liquid. D. Liquid charge through the liquid-line service valve. D. Use a filter drier. D. R717 mechanical ventilation system in the machinery is run continuously 24. When could a reciprocating compressor be damaged if energized, 25. It is best practice to use dry nitrogen to break the vacuum when dehydrating by the triple evacuation method, However, A. When the discharge service valve is closed. D. requires a pressure regulator