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Heat and Mass Transfer

Heat and Mass Transfer
Heat transfer by radiation mainly depends upon

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

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Heat and Mass Transfer
Fourier's law of heat conduction gives the heat flow for

One dimensional cases only
Two dimensional cases only
Nonuniform temperature surfaces
Irregular surfaces

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Heat and Mass Transfer
According to Kirchoff's law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a

Black body
Red hot body
Brilliant white polished body
Grey body

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

Grashoff number
Weber number
Prandtl number
Nusselt number

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Heat and Mass Transfer
The ratio of the energy absorbed by the body to total energy falling on it is called

Absorptivity
Emissive power
Absorptive power
Emissivity

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Heat and Mass Transfer
Unit of thermal conductivity in M.K.S. units is

K cal/hr m² °C
K cal m/hr m² °C
K cal/kg m² °C
K calm/hr °C

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MORE MCQ ON Heat and Mass Transfer

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