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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The coefficient of performance is the ratio of the refrigerant effect to the

All of these
Work done by compressor
Enthalpy increase in compressor
Heat of compression

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Refrigeration and Air Conditioning
In vapour compression refrigeration system, refrigerant occurs as liquid between

Compressor and evaporator
Expansion valve and evaporator
Compressor and condenser
Condenser and expansion valve

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Refrigeration and Air Conditioning
In air-conditioning of aeroplanes, using air as a refrigerant, the cycle used is

Reversed Brayton cycle
Reversed Carnot cycle
Reversed Otto cycle
Reversed Joule cycle

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Refrigeration and Air Conditioning
R-12 is generally preferred over R-22 in deep freezers since

It is miscible with oil over large range of temperatures
All of these
It gives higher coefficient of performance
It has low operating pressures

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Refrigeration and Air Conditioning
The pressure at the inlet of a refrigerant compressor is called

Discharge pressure
Critical pressure
Back pressure
Suction pressure

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Refrigeration and Air Conditioning
In vapour compression cycle, the condition of refrigerant is very wet vapour

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

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MORE MCQ ON Refrigeration and Air Conditioning

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