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Refrigeration and Air Conditioning

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

Compressor
Evaporator
Condenser
Expansion valve

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Refrigeration and Air Conditioning
An important characteristic of absorption system of refrigeration is

quiet operation
very little power consumption
noisy operation
cooling below 0°C

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Refrigeration and Air Conditioning
The reduced ambient air cooling system has

Two cooling turbines and two heat exchangers
One cooling turbine and one heat exchanger
One cooling turbine and two heat exchangers
Two cooling turbines and one heat exchanger

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

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

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Refrigeration and Air Conditioning
The wet bulb temperature during sensible heating of air

Remains constant
Increases
None of these
Decreases

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Refrigeration and Air Conditioning
For obtaining high COP, the pressure range of compressor should be

Low
High
Optimum
Any value

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MORE MCQ ON Refrigeration and Air Conditioning

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