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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant before entering the expansion or throttle valve is

Dry vapour
Wet vapour
High pressure saturated liquid
Very wet vapour

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Refrigeration and Air Conditioning
In case of sensible cooling of air, the coil efficiency is given by

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

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Refrigeration and Air Conditioning
A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be

1 kW
4 kW
2 kW
3 kW

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Refrigeration and Air Conditioning
The power per tonne of refrigeration is

3.5/C.O.P.
3.5 × C.O.P.
O.P/3.5
None of these

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Refrigeration and Air Conditioning
One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice

In 1 hour
In 12 hours
In 24 hours
In 1 minute

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Refrigeration and Air Conditioning
The operating pressure for refrigerating units using R-12 as a refrigerant is

15 bar
8 bar
30 bar
2 bar

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MORE MCQ ON Refrigeration and Air Conditioning

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