- Heat Transfer, Refrigeration and Air Conditioning Quiz

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

A perfect body is one which is black in colour.

At thermal equilibrium, the emissivity and absorptivity are same.

A grey body is one which absorbs all radiations incident on it.

The energy absorbed by a body to the total energy falling on it, is called emissivity.

Correct Answer : Option () :

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

Stefan's law

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

dry bulb temperature

relative humidity

wet bulb temperature

Correct Answer : dry bulb temperature