Radiation : Exchange Between Surfaces Questions And Answers.


1.The interchange factor is also known as?
A. Shape factor
B. Radiosity
C. Irradiation
D. Equivalent emissivity

2.For the same type of shapes, the value of the radiation shape factor will be higher when?
A. Surfaces are closer
B. Surfaces are moved further apart
C. Surfaces are smaller and held closer
D. Surfaces are larger and held closer

3.The grey body shape factor for radiant heat exchange between a small body (emissivity = 0.4) in a large enclosure (emissivity = 0.5) is?
A. 0.1
B. 0.2
C. 0.4
D. 0.5

4.An enclosure consists of four surfaces 1, 2, 3 and 4. The view factors for radiation heat transfers are?
A. 0.50
B. 0.75
C. 0.1
D. 0.25

5.The value of shape factor depends on how many factors?
A. 1
B. 2
C. 3
D. 4

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