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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
A condenser of refrigeration system rejects heat at the rate of 120 kW, while its compressor consumes a power of 30 kW. The coefficient of performance of the system will be

4
3
43834
43833

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Refrigeration and Air Conditioning
In case of sensible heating of air, the coil efficiency is given by (where B.P.F. = Bypass factor)

P.F. - 1
1/ B.P.F.
1 - B. P.F.
1 + B.P.F.

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Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant is dry saturated vapour

After leaving the condenser
Before entering the condenser
Before entering the compressor
After leaving the compressor

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Refrigeration and Air Conditioning
The COP of a domestic refrigerator

Depends upon the make
Is more than 1
Is less than 1
Is equal to 1

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Refrigeration and Air Conditioning
The dry bulb temperature lines, on the psychrometric chart are

Curved lines
Horizontal and uniformly spaced
Horizontal and non-uniformly spaced
Vertical and uniformly spaced

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Refrigeration and Air Conditioning
The evolution of heat of solution takes place in ammonia absorption plant when

Lithium bromide mixes with ammonia
Weak solution mixes with strong solution
Ammonia vapour is driven out of solution
Ammonia vapour goes into solution

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