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Refrigeration and Air Conditioning

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
In case of sensible cooling of air, the coil efficiency is given by

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

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Refrigeration and Air Conditioning
The leakage in a refrigeration system using Freon is detected by

Halide torch
Sulphur sticks
All of these
Soap and water

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

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

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Refrigeration and Air Conditioning
In vapour compression cycle, the condition of refrigerant is saturated liquid

Before entering the expansion valve
Before passing through the condenser
After passing through the condenser
After passing through the expansion throttle valve

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Refrigeration and Air Conditioning
In a domestic vapour compression refrigerator, the refrigerant commonly used is

R-12
CO?
Ammonia
All of these

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MORE MCQ ON Refrigeration and Air Conditioning

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