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Refrigeration and Air Conditioning

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

Expansion valve
Condenser
Compressor
Evaporator

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

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

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Refrigeration and Air Conditioning
Ammonia absorption refrigeration cycle requires

Very little work input
Maximum work input
Zero work input
Nearly same work input as for vapour compression cycle

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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

More/less depending on rating
Less
Same
More

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Refrigeration and Air Conditioning
Rating of a domestic refrigerator is of the order of

5 tons
0.1 ton
40 tons
10 tons

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Refrigeration and Air Conditioning
The leakage in a refrigeration system using Freon is detected by

Sulphur sticks
Halide torch
All of these
Soap and water

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MORE MCQ ON Refrigeration and Air Conditioning

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