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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

5
6
0.2
1.2

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Refrigeration and Air Conditioning
Air refrigerator works on

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

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

Steel
Copper
Brass
Aluminium

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Refrigeration and Air Conditioning
In vapour compression cycle using NH₃ as refrigerant, initial charge is filled at

Suction of compressor
Delivery of compressor
High pressure side close to receiver
Low pressure side near receiver

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Refrigeration and Air Conditioning
During adiabatic saturation process on unsaturated air ___ remains constant.

Relative humidity
Wet bulb temperature
Dew point temperature
Dry bulb temperature

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Refrigeration and Air Conditioning
The condition of refrigerant as it leaves the compressor in a vapour compression system is

Superheated vapour
Saturated liquid
Wet vapour
Dry saturated vapour

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