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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The lowest temperature during the cycle in a vapour compression system occurs after

Condensation
Evaporation
Compression
Expansion

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

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

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Refrigeration and Air Conditioning
The vapour pressure of refrigerant should be

Higher than atmospheric pressure
Equal to atmospheric pressure
Lower than atmospheric pressure
Could be anything

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Refrigeration and Air Conditioning
A standard ice point temperature corresponds to the temperature of

Water at 0°C
Solid and dry ice
Ice at 4°C
Mixture of ice and water under equilibrium conditions

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Refrigeration and Air Conditioning
Pick up the wrong statement. A refrigerant should have

High latent heat of vaporisation
High boiling point
Higher critical temperature
Tow specific heat of liquid

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Refrigeration and Air Conditioning
The coefficient of performance is the ratio of the refrigerant effect to the

Work done by compressor
All of these
Enthalpy increase in compressor
Heat of compression

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MORE MCQ ON Refrigeration and Air Conditioning

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