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Refrigeration and Air Conditioning

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

Same as
None of these
Higher than
Lower than

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

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

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Refrigeration and Air Conditioning
A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be

4 kW
2 kW
1 kW
3 kW

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Refrigeration and Air Conditioning
One tonne of refrigeration (1TR) means that the heat removing capacity is

210 kJ/min
620 kJ/min
420 kJ/min
21 kJ/min

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Refrigeration and Air Conditioning
In vapour compression refrigeration system, refrigerant occurs as liquid between

Compressor and evaporator
Expansion valve and evaporator
Condenser and expansion valve
Compressor and condenser

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Refrigeration and Air Conditioning
The sensible heat factor during the heating and humidification process is given by (where h₁ = Enthalpy of air entering the heating coil, h₂ = Enthalpy of air leaving the heating coil, and hA = Enthalpy of air at the end of humidification process)

(hA - h1)/ (h2 - h1)
(h1 - h2)/ (hA - h2)
(h2 - hA)/ (h1 - h2)
(hA - h2)/ (h1 - h2)

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MORE MCQ ON Refrigeration and Air Conditioning

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