The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m².K. At steady state, the temperature of the right face in °C is

Heat Transfer
The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m².K. At steady state, the temperature of the right face in °C is

63.8

71.2

48.7

77.2

63.8

71.2

48.7

77.2

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Heat Transfer
Prandtl number is the reciprocal of

Mass diffusivity x Momentum diffusivity

Thermal diffusivity/Momentum diffusivity

Thermal diffusivity x Momentum

Thermal diffusivity x Mass diffusivity

Mass diffusivity x Momentum diffusivity

Thermal diffusivity/Momentum diffusivity

Thermal diffusivity x Momentum

Thermal diffusivity x Mass diffusivity

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Heat Transfer
Low thermal conductivity of heat insulating materials is due to its

High proportion of air space

None of these

Dense structure

High specific heat

High proportion of air space

None of these

Dense structure

High specific heat

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Heat Transfer
Boiling point elevation of a solution of NaOH

Both B and C

Increases rapidly with temperature rise

Is almost independent of temperature

Is almost independent of pressure

Both B and C

Increases rapidly with temperature rise

Is almost independent of temperature

Is almost independent of pressure

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Heat Transfer
Use of transverse baffles in a shell and tube heat exchanger is done to increase the

Rate of heat transfer

Turbulence of shell side fluid

All of these

Flow velocity

Rate of heat transfer

Turbulence of shell side fluid

All of these

Flow velocity

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Heat Transfer
In sub-cooled boiling,

Very large vapour space is necessary

Temperature of the heating surface is more than the boiling point of the liquid

Bubbles from heating surface are absorbed by the mass of the liquid

Temperature of the heating surface is less than the boiling point of the liquid

Very large vapour space is necessary

Temperature of the heating surface is more than the boiling point of the liquid

Bubbles from heating surface are absorbed by the mass of the liquid

Temperature of the heating surface is less than the boiling point of the liquid

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Heat Transfer

Heat Transfer Prandtl number is the reciprocal of

Heat Transfer Low thermal conductivity of heat insulating materials is due to its

Heat Transfer Boiling point elevation of a solution of NaOH

Heat Transfer Use of transverse baffles in a shell and tube heat exchanger is done to increase the

Heat Transfer In sub-cooled boiling,

Heat Transfer
Prandtl number is the reciprocal of

Heat Transfer
Low thermal conductivity of heat insulating materials is due to its

Heat Transfer
Boiling point elevation of a solution of NaOH

Heat Transfer
Use of transverse baffles in a shell and tube heat exchanger is done to increase the

Heat Transfer
In sub-cooled boiling,