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Heat and Mass Transfer

Heat and Mass Transfer
Heat transfer by radiation mainly depends upon

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

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Heat and Mass Transfer
Log mean temperature difference in case of counter flow compared to parallel flow will be

Depends on other factors
Less
More
Same

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

Nusselt number
Weber number
Grashoff number
Prandtl number

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Heat and Mass Transfer
Metals are good conductors of heat because

Their atoms collide frequently
Their atoms are relatively far apart
They have high density
They contain free electrons

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Heat and Mass Transfer
The concept of overall coefficient of heat transfer is used in heat transfer problems of

Radiation
Conduction and convection
Conduction
Convection

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Heat and Mass Transfer
Thermal diffusivity of a substance is

Directly proportional to the thermal conductivity
All of these
Inversely proportional to density of substance
Inversely proportional to specific heat

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MORE MCQ ON Heat and Mass Transfer

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