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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

0.2
1.2
6
5

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

22°C
5°C
14°C
8°C

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Refrigeration and Air Conditioning
An evaporator is also known as

Chilling coil
Cooling coil
Freezing coil
All of these

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Refrigeration and Air Conditioning
A vapour absorption refrigerator uses _________ as a refrigerant.

Aqua-ammonia
Water
Ammonia
Freon

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

Same as
Higher than
None of the listed here
Lower than

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Refrigeration and Air Conditioning
A vapour absorption refrigeration system

Requires little power consumption
Cools below 0°C
Gives quiet operation
Gives noisy operation

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