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Heat and Mass Transfer

Heat and Mass Transfer
Heat transfer by radiation mainly depends upon

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

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Heat and Mass Transfer
The rate of energy transferred by convection to that by conduction is called

Peclet number
Biot number
Nusselt number
Stanton number

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Heat and Mass Transfer
Thermal conductivity of glass wool varies from sample to sample because of variation in

Composition
Density
All of these
Porosity

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Heat and Mass Transfer
Cork is a good insulator because it has

Porous body
Atoms colliding frequency
Free electrons
Low density

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Heat and Mass Transfer
The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as

Planck's law
Kirchhoff's law
Stefan's law
Wien's law

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Heat and Mass Transfer
The process of heat transfer from one particle of the body to another by the actual motion of the heated particles, is called

Radiation
Conduction
None of these
Convection

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MORE MCQ ON Heat and Mass Transfer

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