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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The humidification process, on the psychrometric chart is shown by

Vertical line
Curved line
Horizontal line
Inclined line

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

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

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Refrigeration and Air Conditioning
The capacity of a domestic refrigerator is in the range of

0.1 to 0.3 TR
5 to 7 TR
3 to 5 TR
1 to 3 TR

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Refrigeration and Air Conditioning
Formation of frost on evaporator in refrigerator

Can be avoided by proper design
Results in loss of heat due to poor heat transfer
Increases heat transfer rate
Is immaterial

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Refrigeration and Air Conditioning
In a refrigeration cycle, the flow of refrigerant is controlled by

Expansion valve
Evaporator
Condenser
Compressor

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Refrigeration and Air Conditioning
The leaks in a refrigeration system using Freon are detected by

Using reagents
Halide torch which on detection produces greenish flame lighting
Smelling
Sulphur sticks which on detection gives white smoke

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MORE MCQ ON Refrigeration and Air Conditioning

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