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Refrigeration and Air Conditioning Practice Test: Refrigerant Compressors
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Refrigerant Compressors topics include: Multi stage compression, refrigerant compressors and its types. Refrigerant compressors are used to compress refrigerant gas in refrigerators and freezers. When choosing a refrigeration compressor, you can consider things like: Capacity, Condensing temperature, Evaporating temperature, Flow rate, Power.  Other features to consider include: Thermal shut off, Sealing, Low noise, Light weight, Variable speed.  Here are some types of refrigerant compressors: Danfoss refrigeration compressors: These compressors are designed for light commercial... Show more
Refrigeration and Air Conditioning Practice Test: Refrigerant Compressors
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25 Questions

1. Where is the centrifugal compressor mostly suitable?
2. What is the value of optimum intermediate pressure is the cooling ratio is fixed in a compound VCR with intercooling having suction and discharge pressure as 2 and 8 bar respectively?
3. What is the volume of the amount of refrigerant passing through compressor called?
4. What is the value of the clearance factor?
If, VC = Clearance volume and VP = Piston displacement volume
5. Why is multi-stage compression used?
6. What is the volumetric efficiency?
7. What is the expression for optimum intercooler or intermediate pressure P2 if the cooling ratio is fixed in a compound compression refrigeration system with intercooling?
8. What is the value of swept volume?
If, D = 10 mm
L = 6 mm
9. What is the work done during an isentropic compression?
10. What is the expression for optimum intercooler or intermediate pressure P2 if the cooling ratio is fixed in a compound compression refrigeration system with intercooling?
11. Where is the reciprocating compressor mostly suitable?
12. Which of the following is not true about single-stage compression?
13. What the meaning of VS?
14. What is the work done during a polytropic compression?
15. What is the pressure at the inlet of a refrigerant compressor?
16. Reciprocating compressors are used to handle _______ volume of refrigerant.
17. What is the value of volumetric efficiency?
VC = 0.445, VS = 0.843 and VP = 1.087
18. What is the value of the clearance factor?
If, VC = 0.137 and VP = 0.034
19. Where is the reciprocating compressor mostly suitable?
20. What is the work done during an isothermal compression?
21. What is the required condenser and evaporator pressure ratio for reciprocating compressors?
22. What is the purpose of using a refrigerant compressor?
23. What is the required condenser and evaporator pressure ratio for centrifugal compressors?
24. Where is the centrifugal compressor mostly suitable?
25. Pressure or compression ratio is always __________