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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The refrigerant for a refrigerator should have

High total heat
High sensible heat
High latent heat
Low latent heat

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Refrigeration and Air Conditioning
Wet bulb temperature is the temperature of air recorded by a thermometer, when

None of these
Its bulb is surrounded by a wet cloth exposed to the air
It is not affected by the moisture present in the air
The moisture present in it begins to condense

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Refrigeration and Air Conditioning
A vapour absorption refrigeration system

Gives noisy operation
Gives quiet operation
Requires little power consumption
Cools below 0°C

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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)

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

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Refrigeration and Air Conditioning
The evolution of heat of solution takes place in ammonia absorption plant when

Lithium bromide mixes with ammonia
Weak solution mixes with strong solution
Ammonia vapour goes into solution
Ammonia vapour is driven out of solution

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Refrigeration and Air Conditioning
The undesirable property of a refrigerant is

Non-explosive
High boiling point
Non-flammable
Non-toxic

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MORE MCQ ON Refrigeration and Air Conditioning

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