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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Which of the following cycles uses air as the refrigerant?

Carnot
Bell Coleman
Stirling
Ericson

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Refrigeration and Air Conditioning
A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be

5
0.2
6
1.2

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Refrigeration and Air Conditioning
The desirable property of a refrigerant is

All of these
Low boiling point
High latent heat of vaporisation
High critical temperature

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

Centrifugal
Piston type reciprocating
Axial
Miniature sealed unit

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Refrigeration and Air Conditioning
Under cooling in a refrigeration cycle

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

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Refrigeration and Air Conditioning
Short horizontal lines on pressure-enthalpy chart show

Constant entropy lines
Constant pressure lines
Constant temperature lines
Constant total heat lines

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MORE MCQ ON Refrigeration and Air Conditioning

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