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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The boiling point of ammonia is

-30°C
-33.3°C
-10.5°C
-77.7°C

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Refrigeration and Air Conditioning
Where does the lowest temperature occur in a vapour compression cycle?

Expansion valve
Compressor
Condenser
Evaporator

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Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

Greater than
Equal to
Less than
None of the listed here

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Refrigeration and Air Conditioning
The relative coefficient of performance is

Theoretical COP/actual COP
None of these
Actual COP × theoretical COP
Actual COP/theoretical COP

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Refrigeration and Air Conditioning
In a psychrometric chart, specific humidity (moisture content) lines are

Horizontal and non-uniformly spaced
Curved lines
Horizontal and uniformly spaced
Vertical and uniformly spaced

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Refrigeration and Air Conditioning
Air refrigerator works on

Reversed Carnot cycle
Bell Coleman cycle
Both (A) and (B)
None of these

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