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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
Lower than
None of the listed here
Same as

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Refrigeration and Air Conditioning
Superheating in a refrigeration cycle

Increases C.O.P
Decreases C.O.P
Other factors decide C.O.P
O.P remains unaltered

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Refrigeration and Air Conditioning
Most thermostatic expansion valves are set for a superheat of

5°C
20°C
10°C
15°C

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Refrigeration and Air Conditioning
The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is

More
Less
More or less depending on ambient conditions
Same

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Refrigeration and Air Conditioning
In a psychrometric process, the sensible heat added is 30 kJ/s and the latent heat added is 20 kJ/s. The sensible heat factor for the process will be

1.5
0.6
0.67
0.3

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Refrigeration and Air Conditioning
In aircraft, air refrigeration Cycle is used because of

High heat transfer rate
Low weight per tonne of refrigeration
Low temperature at high altitudes
Higher coefficient of performance

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MORE MCQ ON Refrigeration and Air Conditioning

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