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

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