The total radiation from a black body per second per unit area is __________ fourth power of the absolute temperature. This statement is known as Stefan-Boltzmann law.

A)
equal to
B)
directly proportional to
C)
inversely proportional to
D)
All of the above

Correct Answer : Option (B) :   directly proportional to

Recently Updated in Heat Transfer, Refrigeration and Air Conditioning Questions
The value of the wave length for maximum emissive power is given by
A)
Wein's law
B)
Stefan's law
C)
Planck's law
D)
Kirchhoff's law

Correct Answer :   Wein's law

Emissivity of a body will be equal to its absorptivity at all temperatures.
A)
Yes
B)
No
C)
Can Not Say
D)
None of the above

Correct Answer :   Yes

During dehumidification process, __________ remains constant.
A)
specific humidity
B)
dry bulb temperature
C)
relative humidity
D)
wet bulb temperature

Correct Answer :   dry bulb temperature

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