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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The alignment circle is marked on the psychrometric chart at

26°C DBT and 60% RH
26°C DBT and 50% RH
20°C DBT and 60% RH
20°C DBT and 50% RH

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Refrigeration and Air Conditioning
For better C.O.P of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be

Small
High
Equal
Anything

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Refrigeration and Air Conditioning
The C.O.P. of a refrigerator working on a reversed Carnot cycle is (where T₁ = Lowest absolute temperature, and T₂ = Highest absolute temperature)

T₁ / (T₂ - T₁)
T₂/ (T₂ - T₁)
(T₁ - T₂)/T₁
(T₂ - T₁)/T₁

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

Carbon dioxide
Sulphur dioxide
Fluorine
Ammonia

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Refrigeration and Air Conditioning
Ammonia is

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

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Refrigeration and Air Conditioning
An evaporator is also known as

Freezing coil
Cooling coil
Chilling coil
All of these

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MORE MCQ ON Refrigeration and Air Conditioning

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