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1. When first inspecting hermetic system known to be leaking, you should look for,
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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,
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TYPE II Oct 2018

TYPE II

QuestionAnswer
1. When first inspecting hermetic system known to be leaking, you should look for, D. Traces of oil
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.
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%
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
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.
6. When recovery is first started, at what phase is the refrigerant removed to save recovery time, C. Liquid phase
7. Where must you connect the hose in order to recover liquid refrigerant, C. Liquid line
8. Recovering refrigerant from a system in the vapor phase will minimize the loss of which of the following, B. oil
9. After refrigerant liquid has been recovered from the appliance, any remaining vapor, D. removed by the recovery system.
10. How can speed up the removal of the refrigerant charge from a system, B. Cooling the recovery cylinder to lower its pressure.
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.
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.
13. Which of the following statements about recycling and recovery equipment is false? B. Purchases of such equipment must be reported to the EPA.
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
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.
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
17. When can appliances containing refrigerants be recovered to atmospheric pressure, C. Leaks in the appliance make recovery to the prescribed level unattainable.
18. Which of the following repairs would always be consider"major" under EPA regulations, A. Replacement of an evaporator coil.
19. When is it against EPA regulations to use system-dependent recovery equipment, C. When the appliance contains over 15 pounds of refrigerant.
20. What is the state of the refrigerant leaving the receiver in a refrigeration system, C. High pressure liquid.
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.
22. How would you remove moisture from refrigerant in a system. D. Use a filter drier.
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
24. When could a reciprocating compressor be damaged if energized, A. When the discharge service valve is closed.
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
Created by: RonnyTing
 

 



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