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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The humidity ratio or specific humidity is the mass of water vapour present in

1 m3 of dry air
1 m3 of wet air
1 kg of wet air
1 kg of dry air

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

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Refrigeration and Air Conditioning
The index which correlates the combined effects of air temperature, relative humidity and air velocity on the human body, is known as

Effective temperature
Dew point temperature
Mean radiant temperature
None of the listed here

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

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

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Refrigeration and Air Conditioning
Accumulators should have adequate volume to store refrigerant charge at least

0.1
0.25
0.75
0.5

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Refrigeration and Air Conditioning
Absorption system normally uses the following refrigerant

Ammonia
Freon-22
Freon-11
CO2

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MORE MCQ ON Refrigeration and Air Conditioning

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