In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be

Heat Transfer
In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be

Less than 45°C

Initially decreases and remains constant thereafter

More than 45°C

Equal to 45°C

Less than 45°C

Initially decreases and remains constant thereafter

More than 45°C

Equal to 45°C

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Heat Transfer
In SI units, thermal conductivity is expressed in

Watt/m². °K

Watt/m.°K

Watt/m4. °K

Watt/m². °K

Watt/m.°K

Watt/m4. °K

Watt/m². °K

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Heat Transfer
Kirchoff's law is applicable to

Monochromatic radiation only

Only volumes and not to surfaces

Total radiation only

Both A and B

Monochromatic radiation only

Only volumes and not to surfaces

Total radiation only

Both A and B

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Heat Transfer
Vacuum is generally maintained in the vapour space of an evaporator mainly to

Concentrate heat sensitive materials

Achieve very high concentration of the final product

Facilitate forward feeding in multiple effect evaporation

Get economical temperature difference by using moderate pressure steam

Concentrate heat sensitive materials

Achieve very high concentration of the final product

Facilitate forward feeding in multiple effect evaporation

Get economical temperature difference by using moderate pressure steam

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Heat Transfer
If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface tempeature follows __________ law.

Logarithmic

Linear

Parabolic

Hyperbolic

Logarithmic

Linear

Parabolic

Hyperbolic

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Heat Transfer
Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the

Higher condensing film co-efficient is desired

Condensate is corrosive in nature

Temperature of the incoming vapor is very high

Lower pressure drop through the exchanger is desired

Higher condensing film co-efficient is desired

Condensate is corrosive in nature

Temperature of the incoming vapor is very high

Lower pressure drop through the exchanger is desired

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Heat Transfer

Heat Transfer In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be

Heat Transfer In SI units, thermal conductivity is expressed in

Heat Transfer Kirchoff's law is applicable to

Heat Transfer Vacuum is generally maintained in the vapour space of an evaporator mainly to

Heat Transfer If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface tempeature follows __________ law.

Heat Transfer Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the

Heat Transfer
In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be

Heat Transfer
In SI units, thermal conductivity is expressed in

Heat Transfer
Kirchoff's law is applicable to

Heat Transfer
Vacuum is generally maintained in the vapour space of an evaporator mainly to

Heat Transfer
If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface tempeature follows __________ law.

Heat Transfer
Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the