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Refrigeration and Air Conditioning

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

None of these
Increases
Remains constant
Decreases

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Refrigeration and Air Conditioning
The wet bulb temperature at 100% relative humidity is ________ dew point temperature.

Lower than
None of these
Higher than
Same as

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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

0.6
0.376
0.4
0.67

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Refrigeration and Air Conditioning
Superheating in a refrigeration cycle

Increases C.O.P
Other factors decide C.O.P
Decreases C.O.P
O.P remains unaltered

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Refrigeration and Air Conditioning
Moisture should be removed from refrigerants to avoid

All of these
Freezing at the expansion valve
Restriction to refrigerant flow
Corrosion of steel plates

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Refrigeration and Air Conditioning
The bank of tubes at the back of domestic refrigerator is

Capillary tubes
Condenser tubes
Evaporator tubes
Refrigerant cooling tubes

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