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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Ammonia is

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

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Refrigeration and Air Conditioning
In a refrigeration system, heat absorbed in comparison to heat rejected is

Less
Same
More for small capacity and less for high capacity
More

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Refrigeration and Air Conditioning
For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is

Centrifugal
Rotating
Reciprocating
Screw

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Refrigeration and Air Conditioning
In a refrigeration cycle, the flow of refrigerant is controlled by

Evaporator
Compressor
Condenser
Expansion valve

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Refrigeration and Air Conditioning
The central air conditioning system has ___________ overall efficiency as compared to individual systems.

Same
Lower
Higher
None of these

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Refrigeration and Air Conditioning
A pressure gauge on the discharge side of a refrigerant compressor reads too high. The reasons will be

Lack of cooling water
Dirty condenser surface
Water temperature being high
All of these

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MORE MCQ ON Refrigeration and Air Conditioning

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