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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The COP of a domestic refrigerator

Is more than 1
Is less than 1
Depends upon the make
Is equal to 1

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Refrigeration and Air Conditioning
Rating of a domestic refrigerator is of the order of

40 tons
0.1 ton
5 tons
10 tons

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Refrigeration and Air Conditioning
In case of sensible cooling of air, the coil efficiency is given by

1/ B.P.F.
1 + B.P.F.
1 - B.P.F.
P.F. - 1

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Refrigeration and Air Conditioning
The operating temperature of a cold storage is -2°C. The heat leakage from the surrounding is 30 kW for the ambient temperature of 40°C. The actual C.O.P. of refrigeration plant used is one fourth that of ideal plant working between the same temperatures. The power required to drive the plant is

1.86 kW
3.72 kW
7.44 kW
18.6 kW

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Refrigeration and Air Conditioning
While designing the refrigeration system of an aircraft, the prime consideration is that the

Mass of the refrigeration equipment is low
System has high C.O.P.
Mass of refrigerant circulated in the system is low
Power per TR is low

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Refrigeration and Air Conditioning
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

Negative
None of the listed here
Zero
Positive

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