REFRIGERATION AND AIR CONDITIONING QUIZ

In case of sensible cooling of air, the coil efficiency is given by

P.F. - 1

1/ B.P.F.

1 + B.P.F.

1 - B.P.F.

TRUE ANSWER : ?
YOUR ANSWER : ?

The advantage of dry compression is that

It permits higher speeds to be used

It results in high volumetric and mechanical efficiency

It permits complete evaporation in the evaporator

All of these

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Allowable pressure on high pressure side or ammonia absorption system is of the order of

Atmospheric pressure

Slightly above atmospheric pressure

56 bars

24 bars

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The Freon group of refrigerants are

Zoetrope refrigerants

Hydrocarbon refrigerants

Inorganic refrigerants

Halocarbon refrigerants

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The mass of water vapour present in __________ is called absolute humidity.

1 kg of wet air

1 m3 of dry air

1 m3 of water

1 kg of dry air

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Cooling water is required for following equipment in ammonia absorption plant

Evaporator

Condenser

Absorber

Condenser, absorber and separator (rectifier)

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During sensible cooling of air, specific humidity

Decreases

Increases

None of the listed here

Remains constant

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Accumulators should have adequate volume to store refrigerant charge at least

0.25

0.5

0.75

0.1

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Which of the following is not a desirable property of a refrigerant?

High risibility with oil

Large latent heat

Low boiling point

Good electrical conductor

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

Strong solution to ammonia vapour

Strong solution to weak solution

Weak solution to strong solution

Ammonia vapours to weak solution

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YOUR ANSWER : ?

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