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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
An important characteristic of absorption system of refrigeration is

quiet operation
very little power consumption
noisy operation
cooling below 0°C

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Refrigeration and Air Conditioning
In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering air, then the air is

Cooled and dehumidified
Heated and dehumidified
Cooled and humidified
Heated and humidified

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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
It has low operating pressures
It gives higher coefficient of performance
All of these

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Refrigeration and Air Conditioning
Presence of moisture in a refrigerant affects the working of

Evaporator
Expansion valve
Compressor
Condenser

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Refrigeration and Air Conditioning
The capillary tube, as an expansion device, is used in

All of these
Room air conditioners
Domestic refrigerators
Water coolers

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Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

1.2
5
6
0.2

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MORE MCQ ON Refrigeration and Air Conditioning

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