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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

0.6
0.67
0.4
0.376

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Refrigeration and Air Conditioning
The process, generally used in winter air-conditioning to warm and humidity the air, is called

Heating and humidification
Cooling and dehumidification
Humidification
Dehumidification

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Refrigeration and Air Conditioning
On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process

Takes place at constant pressure
Takes place at constant temperature
Takes place at constant entropy
Involves no change in volume

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Refrigeration and Air Conditioning
The leakage in a refrigeration system using Freon is detected by

Soap and water
Sulphur sticks
Halide torch
All of these

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Refrigeration and Air Conditioning
Critical temperature is the temperature above which

Water will evaporate
A gas will never liquefy
Water will never evaporate
A gas will immediately liquefy

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Refrigeration and Air Conditioning
The conditioned air supplied to the room must have the capacity to take up

Room latent heat load only
Room sensible heat load only
Both room sensible heat and latent heat loads
None of the listed here

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