Heat transfer in liquid and gases takes place by

Heat and Mass Transfer
Heat transfer in liquid and gases takes place by

Conduction

Convection

Radiation

Conduction and convection

Conduction

Convection

Radiation

Conduction and convection

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

Conduction and convection

Convection

Conduction

Radiation

Conduction and convection

Convection

Conduction

Radiation

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Heat and Mass Transfer
Which of the following is expected to have highest thermal conductivity?

Water

Melting ice

Steam

Solid ice

Water

Melting ice

Steam

Solid ice

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Heat and Mass Transfer
Heat transfer takes place as per

Zeroth law of thermodynamics

First law of thermodynamic

Second law of the thermodynamics

Kirchoff's law

Zeroth law of thermodynamics

First law of thermodynamic

Second law of the thermodynamics

Kirchoff's law

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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

All of these

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

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

All of these

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

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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 = 0, x = 0 and a = 1

X = 0, a + p = 1

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

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

P = 0, x = 0 and a = 1

X = 0, a + p = 1

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

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

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Heat and Mass Transfer

Heat and Mass Transfer Heat transfer in liquid and gases takes place by

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

Heat and Mass Transfer Which of the following is expected to have highest thermal conductivity?

Heat and Mass Transfer Heat transfer takes place as per

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
Heat transfer in liquid and gases takes place by

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

Heat and Mass Transfer
Which of the following is expected to have highest thermal conductivity?

Heat and Mass Transfer
Heat transfer takes place as per

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)