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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For obtaining high COP, the pressure range of compressor should be

High
Any value
Low
Optimum

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Refrigeration and Air Conditioning
Most of the domestic refrigerators work on the following refrigeration system

Electrolux refrigerator
Vapour compression
Carnot cycle
Vapour absorption

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Refrigeration and Air Conditioning
Short horizontal lines on pressure-enthalpy chart show

Constant total heat lines
Constant entropy lines
Constant pressure lines
Constant temperature lines

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Refrigeration and Air Conditioning
Ammonia is

Non-toxic
Toxic and non-inflammable
Non-inflammable
Highly toxic and inflammable

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Refrigeration and Air Conditioning
The boiling point of ammonia is

-33.3°C
-77.7°C
-30°C
-10.5°C

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Refrigeration and Air Conditioning
The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is

Equal
Smaller/bigger depending on capacity
Bigger
Smaller

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MORE MCQ ON Refrigeration and Air Conditioning

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