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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The COP of a domestic refrigerator

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

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Refrigeration and Air Conditioning
In vapour compression cycle the condition of refrigerant is superheated vapour

Before passing through the condenser
Before entering the expansion valve
After passing through the expansion or throttle valve
After passing through the condenser

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Refrigeration and Air Conditioning
The difference between dry bulb temperature and dew point temperature, is called

Dry bulb depression
Degree of saturation
Dew point depression
Wet bulb depression

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Refrigeration and Air Conditioning
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

2.15
5.12
1.25
1

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Refrigeration and Air Conditioning
A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be

2.33
1.33
3.33
4.33

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Refrigeration and Air Conditioning
The vapour compression refrigerator employs the following cycle

Carnot
Reversed Carnot
Reversed Rankine
Rankine

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MORE MCQ ON Refrigeration and Air Conditioning

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