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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Allowable pressure on high pressure side or ammonia absorption system is of the order of

24 bars
56 bars
Atmospheric pressure
Slightly above atmospheric pressure

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Refrigeration and Air Conditioning
Bell Coleman cycle is a

Reversed Rankine cycle
Reversed Otto cycle
Reversed Joule cycle
Reversed Carnot cycle

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Refrigeration and Air Conditioning
The specific humidity during dehumidification process

Increases
Decreases
None of these
Remains constant

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Refrigeration and Air Conditioning
Which of the following refrigerant has the highest freezing point.

Sulphur dioxide
Ammonia
R-12
Carbon dioxide

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Refrigeration and Air Conditioning
The humidity ratio or specific humidity is the mass of water vapour present in

1 m3 of dry air
1 kg of dry air
1 m3 of wet air
1 kg of wet air

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Refrigeration and Air Conditioning
Freon group of refrigerants are

Nontoxic and non-inflammable
Toxic
Non-inflammable and toxic
Inflammable

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MORE MCQ ON Refrigeration and Air Conditioning

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