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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Where does the lowest temperature occur in a vapour compression cycle?

Evaporator
Expansion valve
Compressor
Condenser

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Refrigeration and Air Conditioning
The vapour compression refrigerator employs the following cycle

Reversed Rankine
Reversed Carnot
Carnot
Rankine

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Refrigeration and Air Conditioning
The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)

20°C DBT and 80% RH
22°C DBT and 60% RH
25°C DBT and 100% RH
25°C DBT and 40% RH

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Refrigeration and Air Conditioning
In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be

Zero
As low as possible (3 to 11°C)
Any value
High, of the order of 25°

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Refrigeration and Air Conditioning
Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption system

Weak solution to strong solution
Strong solution to weak solution
Strong solution to ammonia vapour
Ammonia vapours to weak solution

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Refrigeration and Air Conditioning
The unit of thermal diffusivity is

m/h
m²/h
m²/hK
m/hK

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MORE MCQ ON Refrigeration and Air Conditioning

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