Refrigeration & Air-Conditioning Practice Set-3

May 18, 2021

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

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

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

4. 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

5. Highest temperature encountered in refrigeration cycle should be

6. The condition of refrigerant after passing through the condenser in a vapour compression system is

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

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

9. Which of the following statement is correct?

10. The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature)


 

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