Refrigeration & Air-Conditioning Practice Set-3

May 18, 2021

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1. Most thermostatic expansion valves are set for a superheat of

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

3. The refrigerant after condensation process is cooled below the saturation temperature before throttling. Such a process is called

4. The general rule for rating refrigeration systems (excepting for CO₂ system) is to approximate following h.p. per ton of refrigeration

5. The minimum temperature to which water can be cooled in a cooling tower is

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

7. On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process

8. 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

9. The capillary tube, as an expansion device, is used in

10. The curved lines on a psychrometric chart indicates


 

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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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