The heat transfer takes place according to

Heat and Mass Transfer
The heat transfer takes place according to

First law of thermodynamics

Zeroth law of thermodynamics

Kirchhoff's law

Second law of thermodynamics

First law of thermodynamics

Zeroth law of thermodynamics

Kirchhoff's law

Second law of thermodynamics

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Heat and Mass Transfer
Thermal conductivity of a material may be defined as the

Heat conducted in unit time across unit area through unit thickness when a temperature difference of unity is maintained between opposite faces

Quantity of heat flowing in one second through a slab of the material of area one cm square, thickness 1 cm when its faces differ in temperature by 1°C

Quantity of heat flowing in one second through one cm cube of material when opposite faces are maintained at a temperature difference of 1°C

All of these

Heat conducted in unit time across unit area through unit thickness when a temperature difference of unity is maintained between opposite faces

Quantity of heat flowing in one second through a slab of the material of area one cm square, thickness 1 cm when its faces differ in temperature by 1°C

Quantity of heat flowing in one second through one cm cube of material when opposite faces are maintained at a temperature difference of 1°C

All of these

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Heat and Mass Transfer
Depending on the radiating properties, body will be transparent when (Where a = absorptivity, p = reflectivity, x = transmissivity)

P=1, x = 0, and a = 0

P = 0, x= 1, and a = 0

X = 0, a + p = 1

P = 0, x = 0 and a = 1

P=1, x = 0, and a = 0

P = 0, x= 1, and a = 0

X = 0, a + p = 1

P = 0, x = 0 and a = 1

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

Radiation

Conduction and convection

Conduction

Convection

Radiation

Conduction and convection

Conduction

Convection

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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

Peclet number

Stanton number

Biot number

Grashoff number

Peclet number

Stanton number

Biot number

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Heat and Mass Transfer
The emissive power of a body depends upon its

Wave length

Temperature

Physical nature

All of these

Wave length

Temperature

Physical nature

All of these

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Heat and Mass Transfer

Heat and Mass Transfer The heat transfer takes place according to

Heat and Mass Transfer Thermal conductivity of a material may be defined as the

Heat and Mass Transfer Depending on the radiating properties, body will be transparent when (Where a = absorptivity, p = reflectivity, x = transmissivity)

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

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 emissive power of a body depends upon its

Heat and Mass Transfer
The heat transfer takes place according to

Heat and Mass Transfer
Thermal conductivity of a material may be defined as the

Heat and Mass Transfer
Depending on the radiating properties, body will be transparent when (Where a = absorptivity, p = reflectivity, x = transmissivity)

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

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 emissive power of a body depends upon its