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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

0.67
0.4
0.376
0.6

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Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant is dry saturated vapour

After leaving the condenser
After leaving the compressor
Before entering the condenser
Before entering the compressor

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Refrigeration and Air Conditioning
Freon group of refrigerants are

Non-inflammable and toxic
Toxic
Nontoxic and non-inflammable
Inflammable

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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
1.2
6
0.2

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Refrigeration and Air Conditioning
In mechanical refrigeration system, the refrigerant has the maximum temperature

In evaporator
Between condenser and evaporator
Between compressor and condenser
Before expansion valve

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Refrigeration and Air Conditioning
In case of sensible cooling of air, the coil efficiency is given by

1 + B.P.F.
1 - B.P.F.
P.F. - 1
1/ B.P.F.

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