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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The bypass factor of the heating coil is

0.376
0.4
0.67
0.6

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Refrigeration and Air Conditioning
In S.J. unit, one ton of refrigeration is equal to

210 kJ/ min
840 kJ/ min
21 kJ/ min
420 kJ/ min

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Refrigeration and Air Conditioning
The cooling system used for supersonic aircrafts and rockets is

Reduced ambient air cooling system
Bootstrap air cooling system
Regenerative air cooling system
Simple air cooling system

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Refrigeration and Air Conditioning
In a refrigeration system, the expansion device is connected between the

Compressor and condenser
Receiver and evaporator
Condenser and receiver
Evaporator and compressor

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Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m²/hK
m/h
m²/h
m/hK

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Refrigeration and Air Conditioning
The advantage of dry compression is that

All of these
It permits complete evaporation in the evaporator
It permits higher speeds to be used
It results in high volumetric and mechanical efficiency

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