Refrigeration & Air-Conditioning Practice Set-3

May 18, 2021

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1. A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is

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

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

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

5. Rating of a domestic refrigerator is of the order of

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

7. 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

8. Critical temperature is the temperature above which

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

10. When the temperature of the surrounding is higher than the temperature of the body, then the heat loss by convection from the body to the surrounding 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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