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Mechanic Refrigeration & Air Conditioning Practice Test: Chiller System
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Mechanic Refrigeration & Air Conditioning Practice Test: Central Air Conditioning

Mechanic Refrigeration & Air Conditioning Practice Test: Chiller System
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25 Questions

1. What is the purpose of valves in chiller AC plants?
2. Which valve is used in capacity control system employing hot gas bypass?
3. Which thickness of PUF has the least thermal conductivity?
4. Which parameter indicates that the central AC system has non condensable gas?
5. Which expansion device is used with VFD motors in multi split AC?
6. What is the advantage of variable speed pumping load control in chiller AC plant?
7. What is the effect if the refrigeration system is started before chilled water pump?
8. What is the cause of bubbles in liquid line sight glass after gas charging the system?
9. What is the name of part marked as X in fan coil unit?
10. What is the purpose of gland packing in water line valves of chiller AC plant?
11. Which component protects the electrical circuit and loads from excess current?
12. What is the remedy for no lubrication even if the sight glass shows proper oil level?
13. What is the effect if the oil return from oil separator to the compressor is blocked?
14. What service operation is in progress with shell and tube condenser?
15. What is the name of component used in air distribution system?
16. What is the name of part marked as x in the fan motor compartment?
17. Which refrigerant spreads the pungent odour if it leaks from ice plant system?
18. Which device ensures correct flow of chilled water supply in chiller AC plant?
19. Which type of starter is used for motors in chiller AC plants?
20. Which psychrometric processes are represented between initial (t1) and final (t2) conditions of air in the chart?
21. What is meant by static pressure?
22. Which control trips if the expansion valve inlet strainer is blocked in chiller AC plant?
23. What is the pH level of water used for final rinsing of condenser tubes after descaling?
24. Which material is used for making air ducts in chiller AC plant?
25. What is the effect of improper alignment of machines while installing a central AC plant?

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