Refrigeration & Air-Conditioning Practice Set-3

May 18, 2021

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1. In a refrigeration system, heat absorbed in comparison to heat rejected is

2. The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The bypass factor of the heating coil is

3. The domestic refrigerator uses following type of compressor

4. Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

5. The value of C.O.P in vapour compression cycle is usually

6. A human body feels comfortable when the heat produced by the metabolism of human body is equal to the

7. For obtaining high COP, the pressure range of compressor should be

8. The curved lines on a psychrometric chart indicates

9. In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

10. Critical temperature is the temperature above which


 

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A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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