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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The lowest temperature during the cycle in a vapour compression system occurs after

Expansion
Condensation
Compression
Evaporation

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Refrigeration and Air Conditioning
Mass flow ratio of NH₃ in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of

1: 9
1: 1
1: 3
9: 1

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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

0.67
0.3
1.5
0.6

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Refrigeration and Air Conditioning
For unsaturated air, the dew point temperature is __________ wet bulb temperature.

More than
None of these
Less than
Equal to

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Refrigeration and Air Conditioning
The sub-cooling in a refrigeration cycle

Decreases C.O.P.
None of these
Does not alter C.O.P.
Increases C.O.P.

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

Sulphur sticks
Halide torch
All of these
Soap and water

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