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Refrigeration and Air Conditioning

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

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

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Refrigeration and Air Conditioning
The reduced ambient air cooling system has

Two cooling turbines and one heat exchanger
One cooling turbine and two heat exchangers
Two cooling turbines and two heat exchangers
One cooling turbine and one heat exchanger

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Refrigeration and Air Conditioning
Reducing suction pressure in refrigeration cycle

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

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Refrigeration and Air Conditioning
The condition of refrigerant after passing through the condenser in a vapour compression system is

Wet vapour
Superheated vapour
Dry saturated vapour
Saturated liquid

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Refrigeration and Air Conditioning
Critical pressure of a liquid is the pressure

Above which liquid will remain liquid
Above which liquid becomes solid
Above which liquid becomes gas
Above which liquid becomes vapour

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Refrigeration and Air Conditioning
The wet bulb temperature during sensible cooling of air

None of these
Remains constant
Decreases
Increases

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MORE MCQ ON Refrigeration and Air Conditioning

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