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Heat and Mass Transfer

Heat and Mass Transfer
Heat transfer by radiation mainly depends upon

Its temperature
All of these
Kind and extent of its surface
Nature of the body

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Heat and Mass Transfer
The radiation emitted by a black body is known as

Total radiation
All of these
Black radiation
Full radiation

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Heat and Mass Transfer
In free convection heat transfer, Nusselt number is function of

Grashoff number and Reynold number
Grashoff number and Prandtl number
Grashoff number, Prandtl number and Reynold number
Prandtl number and Reynold number

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Heat and Mass Transfer
Emissivity of a white polished body in comparison to a black body is

Depends upon the shape of body
Same
Lower
Higher

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Heat and Mass Transfer
Depending on the radiating properties, body will be transparent when(Where a = absorptivity, p = reflectivity, x = transmissivity)

P = 0, x = 0 and a = 1
P = 0, x= 1, and a = 0
P=1, x = 0, and a = 0
X = 0, a + p = 1

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Heat and Mass Transfer
A non-dimensional number generally associated with natural convection heat transfer is

Weber number
Prandtl number
Nusselt number
Grashoff number

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MORE MCQ ON Heat and Mass Transfer

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