A perfect black body is one which - Heat Transfer, Refrigeration and Air Conditioning Quiz

Mechanical Engineering : Heat Transfer, Refrigeration and Air Conditioning - Quiz(MCQ)

A perfect black body is one which

is black in colour

absorbs heat radiations of all wave lengths falling on it

transmits the heat radiations

reflects all the heat radiations

Correct Answer : Option (B) : absorbs heat radiations of all wave lengths falling on it

Recently Updated in Heat Transfer, Refrigeration and Air Conditioning Questions

The value of the wave length for maximum emissive power is given by

Wein's law

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Planck's law

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Correct Answer : Wein's law

Emissivity of a body will be equal to its absorptivity at all temperatures.

Yes

Can Not Say

None of the above

Correct Answer : Yes

During dehumidification process, __________ remains constant.

specific humidity

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relative humidity

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Correct Answer : dry bulb temperature