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Refrigeration & Air Conditioning
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Refrigeration & Air Conditioning
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25 Questions

1. The by-pass factor of the coil ___________ with _________ in fin spacing.
2. What is the relation between DBT and WBT if the relative humidity is 100%?
3. The compressor from VCRS is replaced by which of the following in the VARS?
4. Thermostatic expansion valves are usually set for a superheat of?
5. Which of the following has the highest DBT in the chart of outside summer design conditions?
6. What is the value of 110 C on the Fahrenheit scale?
7. The ratio of COP of vapor compression cycle and COP of Carnot cycle is known as?
8. What is the alternate name for thermodynamic wet-bulb temperature?
9. What is the value of an increase in effective temperature do children need than older ones in case of maternity halls?
10. Which of the following denotes dehumidification process on the psychrometric chart?
11. If the value of BPF for one row of a coil is y then what is the value of BPF for n similar rows?
12. What is the value of maximum C.O.P. in terms of temperature?
13. Mechanical Draft cooling towers do not depend on atmospheric air.
14. In case of reciprocating compressors, wet compression is avoided.
15. What is the value of relative humidity if pv = 0.468 bar and ps = 0.893 bar?
16. A refrigerant should have a low latent heat of vaporization at the evaporator temperature.
17. The low-side float valve is located between the condenser and evaporator.
18. Among the following refrigerants, which is having the lowest C.O.P for refrigeration system working under the temperature limits of -15°C and 30°C as evaporator and condenser temperature respectively?
19. What is the formula for the effectiveness of cooling tower from the following?
20. Fog can be cleared by cooling.
21. What is the value of the optimum effective temperature in summer?
22. What is represented by inclined straight lines but non-uniformly spaced on the psychrometric chart?
23. What is the term C.O.P. referred in terms of refrigeration?
24. Which of the following is true about the effect of velocity on the by-pass factor?
25. What is the refrigerant number of Water?

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