Thermal conductivity of a material may be defined as the

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

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
Total heat is the heat required to

Change liquid into vapour

Increase the temperature of a liquid or vapour

Change vapour into liquid

Convert water into steam and superheat it

Change liquid into vapour

Increase the temperature of a liquid or vapour

Change vapour into liquid

Convert water into steam and superheat it

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
Planck’s law holds good for

polished bodies

black bodies

all coloured bodies

All of these

polished bodies

black bodies

all coloured bodies

All of these

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer
The heat of sun reaches to us according to

Convection

Conduction

Radiation

None of these

Convection

Conduction

Radiation

None of these

ANSWER DOWNLOAD EXAMIANS APP

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

Stanton number

Biot number

Grashoff number

Peclet number

Stanton number

Biot number

Grashoff number

Peclet number

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP

Heat and Mass Transfer

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

Heat and Mass Transfer Total heat is the heat required to

Heat and Mass Transfer Planck’s law holds good for

Heat and Mass Transfer The heat of sun reaches to us according to

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

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

Heat and Mass Transfer
Total heat is the heat required to

Heat and Mass Transfer
Planck’s law holds good for

Heat and Mass Transfer
The heat of sun reaches to us according to

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