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

None, A is just a number

W/m.k

W/m.k²

W/m

None, A is just a number

W/m.k

W/m.k²

W/m

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Heat Transfer
For shell and tube heat exchanger, with increasing heat transfer area, the purchased cost per unit heat transfer area

Decreases

Remains constant

Passes through a maxima

Increases

Decreases

Remains constant

Passes through a maxima

Increases

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Heat Transfer
Corrosiveness of steam condensate is due to the presence of

Neither A nor B

Dissolved O₂

CO₂

Both A & B

Neither A nor B

Dissolved O₂

CO₂

Both A & B

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Heat Transfer
Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by

Increasing the tube length

None of these

Keeping the heat transfer surface clean

Enhancing the fluid pumping rate

Increasing the tube length

None of these

Keeping the heat transfer surface clean

Enhancing the fluid pumping rate

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Heat Transfer
A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are kA and kB and the specific heat capacities are CPA and CPB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when

CPA > CPB

KA>2 kB

CPA < CPB

KA < 0.5kB

CPA > CPB

KA>2 kB

CPA < CPB

KA < 0.5kB

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Heat Transfer
In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used

In high range of temperature differences

In low range of temperature differences

Because of its low cost

To prevent corrosion of the tube bundles

In high range of temperature differences

In low range of temperature differences

Because of its low cost

To prevent corrosion of the tube bundles

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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 For shell and tube heat exchanger, with increasing heat transfer area, the purchased cost per unit heat transfer area

Heat Transfer Corrosiveness of steam condensate is due to the presence of

Heat Transfer Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by

Heat Transfer In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used

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
For shell and tube heat exchanger, with increasing heat transfer area, the purchased cost per unit heat transfer area

Heat Transfer
Corrosiveness of steam condensate is due to the presence of

Heat Transfer
Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by

Heat Transfer
In a shell and tube type heat exchanger, the floating tube bundle heat arrangement is used