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Mechanic Refrigeration & Air Conditioning Practice Test: Central Air Conditioning
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Mechanic Refrigeration & Air Conditioning Practice Test: Central Air Conditioning
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25 Questions

1. Which part of a central AC system cannot be repaired after pump down operation?
2. What is the evaporator surface temperature maintained in dehumidifier?
3. Which RAC system belongs to centralised air conditioning?
4. Which part of water pump becomes worn out fast?
5. Which T across water tubes indicates the shell and tube condenser for decaling process?
6. Which device controls the moisture in AC room air?
7. What is the purpose of using the water cooled condenser in industrial AC plant?
8. Which differentiates the industrial AC compared to domestic AC system?
9. Which device is used to measure the static and total pressure of air in ducting systems?
10. What is the effect of residual acid particles after descaling the shell and tube condenser in industrial AC plant?
11. What is meant by total pressure in a duct?
12. Which part of the working refrigeration system, the non condensable accumulate?
13. What is the effect of scale formation inside the tubes of chiller in industrial AC plant?
14. Which component removes the burrs and moisture from the circulating refrigerant in AC plant?
15. Which gauge is connected to the AC plant system before doing pump down operation?
16. Which suction line pressure ensures that the compressor is to be stopped during pump down operation?
17. What is the purpose of using humidistat in an industrial AC plant?
18. Which components are used in AHU of central AC plant?
19. What is the purpose of cooling tower in central AC plant?
20. What is the percentage of HCl used for making descaling solution with water?
21. Why the stainless-steel metal is used to make evaporator in ice plant?
22. What is the effect of partially choked thermostatic expansion valve in central AC plant?
23. Why the glass wool insulation is avoided in ducts?
24. Which device is installed in ducts to control air flow?
25. Which instrument is used to measure the total pressure in an air duct?

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