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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Bell Coleman cycle is a

Reversed Joule cycle
Reversed Carnot cycle
Reversed Otto cycle
Reversed Rankine cycle

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Refrigeration and Air Conditioning
Absorption system normally uses the following refrigerant

Ammonia
CO2
Freon-22
Freon-11

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Refrigeration and Air Conditioning
The evaporator changes the low pressure liquid refrigerant from the expansion valve into

High pressure liquid refrigerant
Low pressure liquid and vapour refrigerant
None of these
Low pressure vapour refrigerant

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Refrigeration and Air Conditioning
If a gas is to be liquefied, its temperature must be

Equal to critical temperature
Reduced to a value below its critical temperature
None of these
Increased to a value above its critical temperature

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Refrigeration and Air Conditioning
In a pressure enthalpy chart, the space to the left of the saturated liquid line represents

Sub-cooled liquid region
Superheated vapour region
Wet vapour region
None of the listed here

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Refrigeration and Air Conditioning
As relative humidity decreases, the dew point temperature will be ___ wet bulb temperature.

Same as
Lower than
None of the listed here
Higher than

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