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Central Air Condition Plant Mechanic Practice Test: Refrigerants
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Central Air Condition Plant Mechanic Practice Test: Refrigerants
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25 Questions

1. What is composition HC blend refrigerant?
2. Which type of relays are used in refrigerators charged with HC refrigerant?
3. Which refrigerant come in Halo carbon group?
4. How much grams of R-134a is required to retrofit a system charged with 200 grams of CFC-12?
5. How much pressure is applied to a refrigerator for leak testing before retrofitting?
6. Which is a desirable property of an ideal refrigerant?
7. What is the purpose of non return valve in vacuum pump?
8. Which one is an inorganic refrigerant?
9. Which refrigerant is used in Automotive air conditioning system?
10. Which oil used with HFC-134a?
11. Which one is an isotropic refrigerant?
12. What is the name of the process for converting CFC-12 refrigerant into HC blend?
13. What is the expansion of ODP?
14. How much percentage the length of capillary tube is increased while retrofitting CFC-12 with HFC 134a?
15. How many flourine atoms are present in R- 717?
16. Which gauge is used to measure pressures above and below atmosphere pressure?
17. What is the purpose of gas ballast in vacuum pump?
18. Which gas is used as a base to measure GWP?
19. What is the number of the refrigerant tetra fluoro ethane?
20. What is the expansion of CFM?
21. Which equipment is shown in the figure?
22. What is the name of the heat carrying medium in refrigeration system?
23. Which equipment is used to evacuate refrigeration system?
24. What is the ODP of HFC-134a?
25. What is the expansion of GWP associated with refrigerant?

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