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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. Which device is used to measure the density of brine solution?
2. Which causes the filter drier to become cold in chiller AC plant?
3. Which control trips if the expansion valve inlet strainer is blocked in chiller AC plant?
4. What is the formula for finding cooling tower efficiency?
5. What is the cause of high condensing pressure in water cooled condenser?
6. Which tool is used to straighten the deformed fins of air cooled condenser?
7. What is the pH level of water used for final rinsing of condenser tubes after descaling?
8. Which type of expansion device is used in flooded chillers?
9. Which process is indicated between 1 and 2 by the arrow mark at constant dry bulb temperature?
10. Which type of heat is absorbed by water while passing through the cooling coils of an indirect expansion chiller plant?
11. Which thickness of PUF has the least thermal conductivity?
12. What is the cause of water hammer or valve chatter in water pump lines?
13. What is the purpose of rinsing the condenser tubes with water after descaling process in industrial AC plant?
14. What service operation is in progress with shell and tube condenser?
15. Which type of cooling tower is used in large capacity chiller plants?
16. Which types of heat are involved in ventilation and infiltration of air to AC space?
17. How the total heat of air is represented in psychrometric chart?
18. Which device ensures correct flow of chilled water supply in chiller AC plant?
19. What is the purpose of gland packing in water line valves of chiller AC plant?
20. What is meant by static pressure?
21. What is the advantage of electrically interlocked circuit for motors and pumps in a chiller plant?
22. What is the reason for low discharge line temperature in chiller AC?
23. How much heat is released from 2 HP motor if 746 W motor releases 3 K Cal/hr?
24. What is the name of part marked as X in fan coil unit?
25. What is the advantage of glass fibre ducting?

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