Two balls of same material and finish have their diameters in the ratio of 2: 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of

Heat and Mass Transfer
Two balls of same material and finish have their diameters in the ratio of 2: 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of

0.16736111111111

0.084027777777778

0.042361111111111

0.043055555555556

0.16736111111111

0.084027777777778

0.042361111111111

0.043055555555556

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Heat and Mass Transfer
The ratio of Nusselt number and the product of Reynold's number and Prandtl number is equal to

Grashoff number

Stanton number

Peclet number

Biot number

Grashoff number

Stanton number

Peclet number

Biot number

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

Convection

None of these

Radiation

Conduction

Convection

None of these

Radiation

Conduction

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Heat and Mass Transfer
In case of liquids and gases, the heat transfer takes place according to

None of these

Conduction

Convection

Radiation

None of these

Conduction

Convection

Radiation

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Heat and Mass Transfer
Fouling factor is used

In case of Newtonian fluids

None of these

When a liquid exchanges heat with a gas

In heat exchanger design as a safety factor

In case of Newtonian fluids

None of these

When a liquid exchanges heat with a gas

In heat exchanger design as a safety factor

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Heat and Mass Transfer
The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles caused by some mechanical means, is known as

Conduction

Free convection

Forced convection

Radiation

Conduction

Free convection

Forced convection

Radiation

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Heat and Mass Transfer

Heat and Mass Transfer Two balls of same material and finish have their diameters in the ratio of 2: 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of

Heat and Mass Transfer The ratio of Nusselt number and the product of Reynold's number and Prandtl number is equal to

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

Heat and Mass Transfer In case of liquids and gases, the heat transfer takes place according to

Heat and Mass Transfer Fouling factor is used

Heat and Mass Transfer The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles caused by some mechanical means, is known as

Heat and Mass Transfer
Two balls of same material and finish have their diameters in the ratio of 2: 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of

Heat and Mass Transfer
The ratio of Nusselt number and the product of Reynold's number and Prandtl number is equal to

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

Heat and Mass Transfer
In case of liquids and gases, the heat transfer takes place according to

Heat and Mass Transfer
Fouling factor is used

Heat and Mass Transfer
The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles caused by some mechanical means, is known as