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Refrigeration and Air Conditioning

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

Low
Optimum
High
Any value

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Refrigeration and Air Conditioning
Aqua ammonia is used as refrigerant in the following type of refrigeration system

Direct
Compression
Absorption
Indirect

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Refrigeration and Air Conditioning
The colour of the flame of halide torch, in case of leakage of Freon refrigerant, will change to

Orange
Red
Bright green
Yellow

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Refrigeration and Air Conditioning
The capillary tube is not used in large capacity refrigeration systems because

It is made of copper
Required pressure drop cannot be achieved
Capacity control is not possible
Cost is too high

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Refrigeration and Air Conditioning
Freon group of refrigerants are

Non-inflammable and toxic
Nontoxic and non-inflammable
Toxic
Inflammable

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

Low
High
Very low
Same

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MORE MCQ ON Refrigeration and Air Conditioning

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