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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Which of the following is not a desirable property of a refrigerant?

High risibility with oil
Low boiling point
Good electrical conductor
Large latent heat

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

Piston type reciprocating
Axial
Centrifugal
Miniature sealed unit

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Refrigeration and Air Conditioning
Superheating in a refrigeration cycle

Decreases C.O.P
Other factors decide C.O.P
Increases C.O.P
O.P remains unaltered

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Refrigeration and Air Conditioning
The evaporator used in household refrigerators is

Frosting evaporator
None of these
Non-frosting evaporator
Defrosting evaporator

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Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

5
0.2
6
1.2

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Refrigeration and Air Conditioning
The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is

Bigger
Smaller/bigger depending on capacity
Equal
Smaller

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MORE MCQ ON Refrigeration and Air Conditioning

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