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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is___ dry bulb temperature.

Higher than
Same as
Lower than
None of the listed here

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Refrigeration and Air Conditioning
The leakage in a refrigeration system using Freon is detected by

Halide torch
All of these
Soap and water
Sulphur sticks

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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

5.12
2.15
1
1.25

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

T₂/ (T₂ - T₁)
(T₂ - T₁)/T₁
(T₁ - T₂)/T₁
T₁ / (T₂ - T₁)

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Refrigeration and Air Conditioning
Hydrogen is used in Electrolux refrigeration system so as to _________ the rate of evaporation of the liquid ammonia passing through the evaporator.

Equalize
Reduce
None of these
Increase

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Refrigeration and Air Conditioning
The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to

Yellow
Red
Bright green
Orange

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MORE MCQ ON Refrigeration and Air Conditioning

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