Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)

Heat and Mass Transfer
Fourier's law of heat conduction is (where Q = Amount of heat flow through the body in unit time, A = Surface area of heat flow, taken at right angles to the direction of heat flow, dT = Temperature difference on the two faces of the body, dx = Thickness of the body, through which the heat flows, taken along the direction of heat flow, and k = Thermal conductivity of the body)

k. A. (dT/dx)

k. A. (dx/dT)

k. (dx/dT)

k. (dT/dx)

k. A. (dT/dx)

k. A. (dx/dT)

k. (dx/dT)

k. (dT/dx)

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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

Conduction

None of these

Convection

Radiation

Conduction

None of these

Convection

Radiation

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Heat and Mass Transfer
According to Stefan Boltzmann law, the total radiation from a black body per second per unit area is directly proportional to the

Fourth power of the absolute temperature

Square of the absolute temperature

Cube of the absolute temperature

Absolute temperature

Fourth power of the absolute temperature

Square of the absolute temperature

Cube of the absolute temperature

Absolute temperature

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Heat and Mass Transfer
Which of the following is a case of steady state heat transfer?

I.C. engine

None of these

Heating of building in winter

Air preheaters

I.C. engine

None of these

Heating of building in winter

Air preheaters

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Heat and Mass Transfer
Stefan Boltzmann law is applicable for heat transfer by

Radiation

Conduction

Conduction and radiation combined

Convection

Radiation

Conduction

Conduction and radiation combined

Convection

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Heat and Mass Transfer
The amount of radiation mainly depends upon the

All of these

Temperature of the body

Nature of the body

Type of surface of the body

All of these

Temperature of the body

Nature of the body

Type of surface of the body

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Heat and Mass Transfer

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

Heat and Mass Transfer According to Stefan Boltzmann law, the total radiation from a black body per second per unit area is directly proportional to the

Heat and Mass Transfer Which of the following is a case of steady state heat transfer?

Heat and Mass Transfer Stefan Boltzmann law is applicable for heat transfer by

Heat and Mass Transfer The amount of radiation mainly depends upon the

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

Heat and Mass Transfer
According to Stefan Boltzmann law, the total radiation from a black body per second per unit area is directly proportional to the

Heat and Mass Transfer
Which of the following is a case of steady state heat transfer?

Heat and Mass Transfer
Stefan Boltzmann law is applicable for heat transfer by

Heat and Mass Transfer
The amount of radiation mainly depends upon the