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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?

Sulphur dioxide
Ammonia
Carbon dioxide
Fluorine

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Refrigeration and Air Conditioning
Most air cooled condensers are designed to operate with a temperature difference of

5°C
8°C
14°C
22°C

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Refrigeration and Air Conditioning
For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of

Aluminium
Brass
Steel
Copper

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

Dry saturated vapour
Superheated vapour
Wet vapour
Saturated liquid

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

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

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

Increases
Remains constant
None of these
Decreases

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