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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The undesirable property of a refrigerant is

Non-toxic
High boiling point
Non-explosive
Non-flammable

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Refrigeration and Air Conditioning
The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases,

Will be higher
Will remain unaffected
Will be lower
May be higher or lower depending upon the nature of non-condensable gases

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Refrigeration and Air Conditioning
The air cooling system mostly used in transport type aircrafts is

Simple evaporative air cooling system
All of the listed here
Bootstrap air cooling system
Simple air cooling system

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

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

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Refrigeration and Air Conditioning
The condition of refrigerant as it leaves the compressor in a vapour compression system is

Superheated vapour
Saturated liquid
Wet vapour
Dry saturated vapour

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Refrigeration and Air Conditioning
Under cooling in a refrigeration cycle

O.P remains unaltered
Increases C.O.P
Other factors decide C.O.P
Decreases C.O.P

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MORE MCQ ON Refrigeration and Air Conditioning

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