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Heat and Mass Transfer

Heat and Mass Transfer
The transfer of heat by molecular collision is known as

None of these
Conduction
Radiation
Convection

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Heat and Mass Transfer
Heat transfer by radiation mainly depends upon

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

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Heat and Mass Transfer
The rate of heat flow through a body is Q = [kA (T₁ - T₂)]/x. The term x/kA is known as

None of these
Thermal coefficient
Thermal conductivity
Thermal resistance

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Heat and Mass Transfer
The amount of radiation mainly depends on

Temperature of body
All of these
Nature of body
Type of surface of body

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Heat and Mass Transfer
Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by

Convection
Free convection
Forced convection
Radiation

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Heat and Mass Transfer
Thermal conductivity of water in general with rise in temperature

Increases
Remain constant
Decreases
May increase or decrease depending on temperature

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