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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A vapour absorption refrigeration system

Cools below 0°C
Gives quiet operation
Requires little power consumption
Gives noisy operation

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Refrigeration and Air Conditioning
The undesirable property of a refrigerant is

Non-toxic
Non-flammable
High boiling point
Non-explosive

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Refrigeration and Air Conditioning
The evaporator used in household refrigerators is

Frosting evaporator
Non-frosting evaporator
None of these
Defrosting evaporator

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Refrigeration and Air Conditioning
The superheating in a refrigeration cycle

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

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Refrigeration and Air Conditioning
The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases,

Will be lower
Will be higher
Will remain unaffected
May be higher or lower depending upon the nature of non-condensable gases

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

Axial
Centrifugal
Piston type reciprocating
Miniature sealed unit

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MORE MCQ ON Refrigeration and Air Conditioning

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