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Refrigeration and Air Conditioning

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

Sulphur sticks
Soap and water
All of these
Halide torch

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Refrigeration and Air Conditioning
Wet bulb temperature is the temperature of air recorded by a thermometer, when

None of these
Its bulb is surrounded by a wet cloth exposed to the air
It is not affected by the moisture present in the air
The moisture present in it begins to condense

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

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

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Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

None of the listed here
Less than
Equal to
Greater than

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Refrigeration and Air Conditioning
For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference (tm) for parallel flow is ________ that for counter flow.

Equal to
None of these
Greater than
Less than

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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: 3
1: 1
9: 1

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