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