Refrigeration & Air-Conditioning Practice Set-3

May 18, 2021

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1. Critical temperature is the temperature above which

2. 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

3. The operating pressure for refrigerating units using R-12 as a refrigerant is

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

5. In a refrigeration system, the expansion device is connected between the

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

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

8. The boiling point of ammonia is

9. In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to

10. If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be


 

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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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