TYPE II
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| 1. When first inspecting hermetic system known to be leaking, you should look for, | D. Traces of oil
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| 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, | B. Rotating shaft seal.
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| 3. Starting in 2019, what rate triggers the EPA requirement that the refrigement containing 50 pounds or more of R-22 be repaired, | B. 20%
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| 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, | C. Within 10 days
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| 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, | B. Conduct additional repairs within 30 day repair window or mothball the appliance.
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| 6. When recovery is first started, at what phase is the refrigerant removed to save recovery time, | C. Liquid phase
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| 7. Where must you connect the hose in order to recover liquid refrigerant, | C. Liquid line
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| 8. Recovering refrigerant from a system in the vapor phase will minimize the loss of which of the following, | B. oil
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| 9. After refrigerant liquid has been recovered from the appliance, any remaining vapor, | D. removed by the recovery system.
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| 10. How can speed up the removal of the refrigerant charge from a system, | B. Cooling the recovery cylinder to lower its pressure.
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| 11. Why could a recycling or recovery machine that uses a hermetic compressor overheat when drawing deep vaccum, | B. The motor relies on the flow of refrigerant through the compressor for cooling.
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| 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, | D. remove the R-22 from recovery unit and change the filter.
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| 13. Which of the following statements about recycling and recovery equipment is false? | B. Purchases of such equipment must be reported to the EPA.
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| 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, | 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
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| 15. What should be done after reaching the required recovery vacuum on an appliance, | B. Wait for at least a few mins to see if the system pressure rises.
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| 16. Before making a major repair, technicians must evacuate an appliance or component containing more then 200 pounds of R-410A to which of the following levels, | C. 10 inches of Hg vacuum
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| 17. When can appliances containing refrigerants be recovered to atmospheric pressure, | C. Leaks in the appliance make recovery to the prescribed level unattainable.
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| 18. Which of the following repairs would always be consider"major" under EPA regulations, | A. Replacement of an evaporator coil.
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| 19. When is it against EPA regulations to use system-dependent recovery equipment, | C. When the appliance contains over 15 pounds of refrigerant.
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| 20. What is the state of the refrigerant leaving the receiver in a refrigeration system, | C. High pressure liquid.
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| 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. | D. Liquid charge through the liquid-line service valve.
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| 22. How would you remove moisture from refrigerant in a system. | D. Use a filter drier.
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| 23. For what refrigerant is an equipment room refrigerant detector not require ASHRAE Standard 15 provided the mechanical ventilation system in the machinery is run continuously | D. R717
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| 24. When could a reciprocating compressor be damaged if energized, | A. When the discharge service valve is closed.
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| 25. It is best practice to use dry nitrogen to break the vacuum when dehydrating by the triple evacuation method, However, | D. requires a pressure regulator
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