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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
During sensible cooling of air, specific humidity

None of the listed here
Increases
Decreases
Remains constant

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Refrigeration and Air Conditioning
Which of the following statement is correct for ammonia as a refrigerant?

It is toxic to mucous membranes.
All of these
It requires large displacement per TR compared to fluoro carbons.
It reacts with copper and its alloys.

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Refrigeration and Air Conditioning
The lowest temperature during the cycle in a vapour compression system occurs after

Compression
Condensation
Expansion
Evaporation

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

Saturated liquid
Dry saturated vapour
Wet vapour
Superheated vapour

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

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

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Refrigeration and Air Conditioning
Refrigeration in aeroplanes usually employs the following refrigerant

Freon-22
CO2
Air
Freon-11

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