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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Freon group of refrigerants are

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

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Refrigeration and Air Conditioning
The temperature of ammonia after compression in a vapour compression system is

50 to 70°C
20 to 50°C
70 to 110°C
None of these

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Refrigeration and Air Conditioning
For air conditioning the operation theater in a hospital, the percentage of outside air in the air supplied is

50
100
Zero
20

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Refrigeration and Air Conditioning
The domestic refrigerator uses following type of compressor

Axial
Miniature sealed unit
Piston type reciprocating
Centrifugal

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Refrigeration and Air Conditioning
The formation of frost on cooling coils in a refrigerator

Reduces power consumption
Increases heat transfer
Improves C.O.P. of the system
Increases power consumption

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Refrigeration and Air Conditioning
The dry bulb temperature during sensible heating of air

Increases
None of these
Decreases
Remains constant

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MORE MCQ ON Refrigeration and Air Conditioning

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