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Central Air Condition Plant Mechanic Practice Test: Refrigerants
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Avg score: 83% • Most missed: “Which refrigerant create cooling by absorbing sensible heat?”
Central Air Condition Plant Mechanic Practice Test: Refrigerants
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25 Questions

1. What is the ODP of R-22 refrigerant?
2. What is the disadvantage of HC refrigerant?
3. Which gauge is used to measure pressures above and below atmosphere pressure?
4. Which gas is used as a base to measure ODP of refrigerants?
5. What is the GWP of R-134a?
6. How many flourine atoms are present in R- 717?
7. Which device in vacuum pump prevent entry of air into the system during power failure?
8. Which gas is used as a base to measure GWP?
9. How much weight of HC blend is required to retrofit a system contains 200 gms of R12?
10. What is the expansion of ODP?
11. What is the name of the heat carrying medium in refrigeration system?
12. Which process removes moisture and non- condensible gases from refrigeration system?
13. What is composition HC blend refrigerant?
14. Which equipment is used to evacuate refrigeration system?
15. What is the expansion of GWP associated with refrigerant?
16. What is the atmosphere pressure at sea level?
17. Which type of relays are used in refrigerators charged with HC refrigerant?
18. What is the cylinder color of R-717?
19. What is the expansion of CFM?
20. Which are the elements of brine solution?
21. Which one is an isotropic refrigerant?
22. What is the ODP of R-600a?
23. Which refrigerant is known as R-717?
24. Which refrigerant create cooling by absorbing sensible heat?
25. What is the purpose of non return valve in vacuum pump?

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