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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A refrigerant with the highest critical pressure is

R-12
Ammonia
R-22
R-11

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Refrigeration and Air Conditioning
The dry bulb temperature lines, on the psychrometric chart are

Vertical and uniformly spaced
Horizontal and non-uniformly spaced
Horizontal and uniformly spaced
Curved lines

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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
For obtaining high COP, the pressure range of compressor should be

High
Low
Any value
Optimum

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Refrigeration and Air Conditioning
In aqua ammonia and Lithium bromide water absorption refrigeration systems, the refrigerants are respectively

Ammonia and lithium bromide
Ammonia and water
Water and water
Water and lithium bromide

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Refrigeration and Air Conditioning
The value of C.O.P in vapour compression cycle is usually

Any one of the above
Always more than unity
Always less than unity
Equal to unity

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MORE MCQ ON Refrigeration and Air Conditioning

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