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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Cooling water is required for following equipment in ammonia absorption plant

Condenser
Absorber
Evaporator
Condenser, absorber and separator (rectifier)

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Refrigeration and Air Conditioning
For ammonia refrigerating systems, the tubes of a shell and tube condenser are made of

Steel
Aluminium
Copper
Brass

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Refrigeration and Air Conditioning
Formation of frost on evaporator in refrigerator

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

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Refrigeration and Air Conditioning
In vapour compression cycle the condition off refrigerant is dry saturated vapour

After passing through the condenser
After passing through the expansion or throttle valve
Before entering the compressor
Before passing through the condenser

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Refrigeration and Air Conditioning
The emissivity of a polished silver body is ____ as compared to black body.

High
Very low
Low
Same

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Refrigeration and Air Conditioning
Which of the following is not a desirable property of a refrigerant?

High risibility with oil
Low boiling point
Large latent heat
Good electrical conductor

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MORE MCQ ON Refrigeration and Air Conditioning

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