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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Ammonia is

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

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Refrigeration and Air Conditioning
Condensing temperature in a refrigerator is the temperature

Of cooling medium
Of evaporator
Of freezing zone
At which refrigerant gas becomes liquid

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Refrigeration and Air Conditioning
Which of the following statement is correct for ammonia as a refrigerant?

It reacts with copper and its alloys.
It is toxic to mucous membranes.
It requires large displacement per TR compared to fluoro carbons.
All of these

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Refrigeration and Air Conditioning
Highest pressure encountered in a refrigeration system should be

Critical pressure of refrigerant
Much below critical pressure
Much above critical pressure
Near critical pressure

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Refrigeration and Air Conditioning
In aircraft, air refrigeration Cycle is used because of

High heat transfer rate
Low temperature at high altitudes
Higher coefficient of performance
Low weight per tonne of refrigeration

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Refrigeration and Air Conditioning
Which of the following refrigerant has the maximum ozone depletion potential in the stratosphere?

Ammonia
Fluorine
Sulphur dioxide
Carbon dioxide

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MORE MCQ ON Refrigeration and Air Conditioning

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