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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In S.J. unit, one ton of refrigeration is equal to

840 kJ/ min
210 kJ/ min
420 kJ/ min
21 kJ/ min

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Refrigeration and Air Conditioning
Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?

1.25
0.25
0.8
0.5

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Refrigeration and Air Conditioning
An Electrolux refrigerator is called a ___ absorption system.

Two fluids
Three fluids
None of the listed here
Single fluid

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Refrigeration and Air Conditioning
The refrigerant used in small tonnage commercial machines (hermetically sealed units) is

Carbon dioxide
Sulphur dioxide
Ammonia
R-12

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Refrigeration and Air Conditioning
The leaks in a refrigeration system using Freon are detected by

Halide torch which on detection produces greenish flame lighting
Sulphur sticks which on detection gives white smoke
Smelling
Using reagents

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Refrigeration and Air Conditioning
The relative humidity lines on a psychrometric chart are

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

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