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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is

Centrifugal
Reciprocating
Screw
Rotating

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Refrigeration and Air Conditioning
In a refrigeration cycle, the flow of refrigerant is controlled by

Evaporator
Expansion valve
Condenser
Compressor

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Refrigeration and Air Conditioning
A refrigerating system operating on reversed Brayton refrigeration cycle is used for maintaining 250 K. If the temperature at the end of constant pressure cooling is 300 K and rise in the temperature of air in the refrigerator is 50 K, then the net work of compression will be (assume air as working substance with Cp = 1 kJ/kg)

50 kJ/kg
100 kJ/kg
125 kJ/kg
25 kJ/kg

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Refrigeration and Air Conditioning
In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)

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

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Refrigeration and Air Conditioning
For unsaturated air, the dew point temperature is __________ wet bulb temperature.

Equal to
Less than
More than
None of these

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Refrigeration and Air Conditioning
The value of C.O.P in vapour compression cycle is usually

Any one of the above
Equal to unity
Always less than unity
Always more than unity

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MORE MCQ ON Refrigeration and Air Conditioning

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