The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be

Heat Transfer
The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be

W/m.k

W/m.k²

W/m

None, A is just a number

W/m.k

W/m.k²

W/m

None, A is just a number

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Heat Transfer
The film thickness for laminar film condensation on vertical surface __________ from top to bottom.

And the surface conductance increase

Cummulatively decreases

Cummulatively increases

Remains constant

And the surface conductance increase

Cummulatively decreases

Cummulatively increases

Remains constant

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Heat Transfer
Which of the following has maximum thermal conductivity?

Iron

Coal

Nitrogen

Tar

Iron

Coal

Nitrogen

Tar

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Heat Transfer
In case of a vertical tube evaporator, with increase in the liquor level, the

Capacity of the evaporator is decreased

Both B and C

True temperature drop increases

Capacity of the evaporator is increased

Capacity of the evaporator is decreased

Both B and C

True temperature drop increases

Capacity of the evaporator is increased

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Heat Transfer
The advantage of using a 1 - 2 shell and tube heat exchanger over a 1 - 1 shell and tube heat exchanger is

Higher tube side heat transfer co-efficient

Lower tube side pressure drop

Lower shell side pressure drop

Higher shell side heat transfer co-efficient

Higher tube side heat transfer co-efficient

Lower tube side pressure drop

Lower shell side pressure drop

Higher shell side heat transfer co-efficient

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Heat Transfer
In sub-cooled boiling,

Very large vapour space is necessary

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

Very large vapour space is necessary

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

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Heat Transfer

Heat Transfer The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be

Heat Transfer The film thickness for laminar film condensation on vertical surface __________ from top to bottom.

Heat Transfer Which of the following has maximum thermal conductivity?

Heat Transfer In case of a vertical tube evaporator, with increase in the liquor level, the

Heat Transfer The advantage of using a 1 - 2 shell and tube heat exchanger over a 1 - 1 shell and tube heat exchanger is

Heat Transfer In sub-cooled boiling,

Heat Transfer
The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be

Heat Transfer
The film thickness for laminar film condensation on vertical surface __________ from top to bottom.

Heat Transfer
Which of the following has maximum thermal conductivity?

Heat Transfer
In case of a vertical tube evaporator, with increase in the liquor level, the

Heat Transfer
The advantage of using a 1 - 2 shell and tube heat exchanger over a 1 - 1 shell and tube heat exchanger is

Heat Transfer
In sub-cooled boiling,