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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Accumulators should have adequate volume to store refrigerant charge at least

0.75
0.25
0.1
0.5

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Refrigeration and Air Conditioning
In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)

P.F. - 1
1 - B. P.F.
1 + B.P.F.
1/ B.P.F.

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Refrigeration and Air Conditioning
Reducing suction pressure in refrigeration cycle

Lowers evaporation temperature
Increases power required per ton of refrigeration
All of these
Lowers compressor capacity because vapour is lighter

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

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

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Refrigeration and Air Conditioning
For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is

Centrifugal
Rotating
Screw
Reciprocating

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

Bell Coleman
Carnot
Stirling
Ericson

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MORE MCQ ON Refrigeration and Air Conditioning

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