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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
When the temperature of the surrounding is higher than the temperature of the body, then the heat loss by convection from the body to the surrounding will be

Negative
Positive
Zero
None of the listed here

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Refrigeration and Air Conditioning
The heat rejection factor (HRF) is given by

1 + (1/C.O.P)
1 - (1/C.O.P)
1 + C.O.P
1 - C.O.P.

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

Rotating
Centrifugal
Reciprocating
Screw

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Refrigeration and Air Conditioning
Vapour compression refrigeration is somewhat like

None of these
Carnot cycle
Reversed Carnot cycle

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Refrigeration and Air Conditioning
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be

Heated and dehumidified
Heated and humidified
Cooled and dehumidified
Cooled and humidified

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Refrigeration and Air Conditioning
During a refrigeration cycle, heat is rejected by the refrigerant in a

Compressor
Expansion valve
Evaporator
Condenser

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MORE MCQ ON Refrigeration and Air Conditioning

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