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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The higher temperature in vapour compression cycle occurs at

Expansion valve
Receiver
Compressor discharge
Evaporator

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Refrigeration and Air Conditioning
Which of the following refrigerant has the lowest freezing point?

R-22
R-11
Ammonia
R-12

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Refrigeration and Air Conditioning
The coefficient of performance of Heat Pump is always ___ one.

Less than
None of the listed here
Greater than
Equal to

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Refrigeration and Air Conditioning
The ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure, is called

Relative humidity
Degree of saturation
Humidity ratio
Absolute humidity

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Refrigeration and Air Conditioning
Nusselt number (NN) is given by

NN = hl/k
NN = V²/t.cp
NN = μ cp/k
NN = ρ V l /μ

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Refrigeration and Air Conditioning
If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be

Same
More/less depending on rating
More
Less

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MORE MCQ ON Refrigeration and Air Conditioning

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