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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be

Anything
Small
High
Equal

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Refrigeration and Air Conditioning
A vapour absorption refrigeration system

Gives quiet operation
Gives noisy operation
Requires little power consumption
Cools below 0°C

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Refrigeration and Air Conditioning
Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

0.25
0.8
0.5
1.25

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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

18.6 kW
3.72 kW
7.44 kW
1.86 kW

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Refrigeration and Air Conditioning
Moisture in Freon refrigeration system causes

High power consumption
Corrosion of whole system
Ineffective refrigeration
Freezing automatic regulating valve

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Refrigeration and Air Conditioning
Most air cooled condensers are designed to operate with a temperature difference of

5°C
14°C
8°C
22°C

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MORE MCQ ON Refrigeration and Air Conditioning

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