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

77.2

48.7

71.2

63.8

77.2

48.7

71.2

63.8

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Heat Transfer
Radiation energy is emitted by all the substances, which are above

0°K

0°C

100°C

none of the listed here

0°K

0°C

100°C

none of the listed here

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Heat Transfer
With increase in temperature, the thermal conductivity of non-metallic amorphous solids

decreases

remains same

increases

None of the listed here

decreases

remains same

increases

None of the listed here

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Heat Transfer
Nusselt number is the ratio of the temperature gradient at the wall to

Temperature difference

None of these

That across the entire pipe

Heat flux

Temperature difference

None of these

That across the entire pipe

Heat flux

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Heat Transfer
The advantage of backward feed multiple effect evaporators over forward feed units is that

There is no additional cost of pumping

Most concentrated liquid is at highest temperature

Heat sensitive material can be handled

Equal heat transfer co-efficients exist in various effects

There is no additional cost of pumping

Most concentrated liquid is at highest temperature

Heat sensitive material can be handled

Equal heat transfer co-efficients exist in various effects

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Heat Transfer
It is not preferable to use superheated steam in evaporators, because of its very

none of the listed here

high temperature

low film co-efficient

high pressure

none of the listed here

high temperature

low film co-efficient

high pressure

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Heat Transfer

Heat Transfer Radiation energy is emitted by all the substances, which are above

Heat Transfer With increase in temperature, the thermal conductivity of non-metallic amorphous solids

Heat Transfer Nusselt number is the ratio of the temperature gradient at the wall to

Heat Transfer The advantage of backward feed multiple effect evaporators over forward feed units is that

Heat Transfer It is not preferable to use superheated steam in evaporators, because of its very

Heat Transfer
Radiation energy is emitted by all the substances, which are above

Heat Transfer
With increase in temperature, the thermal conductivity of non-metallic amorphous solids

Heat Transfer
Nusselt number is the ratio of the temperature gradient at the wall to

Heat Transfer
The advantage of backward feed multiple effect evaporators over forward feed units is that

Heat Transfer
It is not preferable to use superheated steam in evaporators, because of its very