The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is

Heat Transfer
The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is

333W/m².K

287 W/m².K

894W/m².K

1200W/m².K

333W/m².K

287 W/m².K

894W/m².K

1200W/m².K

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Heat Transfer
Heat flux, as defined in heat flow is analogous to __________ in electricity flow.

Voltage

Resistance

Current

None of these

Voltage

Resistance

Current

None of these

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Heat Transfer
Arithmetic mean area can be used in heat transfer problem to calculate the heat flow by conduction through a cylinder which is

Having the value of Ao/Ai > 2

Both B and C

Thin walled having the value of Ao Ai/< 2

Thick walled

Having the value of Ao/Ai > 2

Both B and C

Thin walled having the value of Ao Ai/< 2

Thick walled

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Heat Transfer
In the equation Q = UAΔt; Δt is

The difference of average bulk temperatures of hot and cold fluids

Geometric mean temperature difference

Arithmetic mean temperature difference

Logarithmic mean temperature difference

The difference of average bulk temperatures of hot and cold fluids

Geometric mean temperature difference

Arithmetic mean temperature difference

Logarithmic mean temperature difference

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Heat Transfer
Film boiling occurs at __________ pressure.

negative

atmospheric

very high

none of the listed here

negative

atmospheric

very high

none of the listed here

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Heat Transfer
A multiple effect evaporator as compared to a single effect evaporator of the same capacity has

Lower heat transfer area

Higher solute concentration in the product

Lower steam economy

Higher steam economy

Lower heat transfer area

Higher solute concentration in the product

Lower steam economy

Higher steam economy

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Heat Transfer

Heat Transfer The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is

Heat Transfer Heat flux, as defined in heat flow is analogous to __________ in electricity flow.

Heat Transfer Arithmetic mean area can be used in heat transfer problem to calculate the heat flow by conduction through a cylinder which is

Heat Transfer In the equation Q = UAΔt; Δt is

Heat Transfer Film boiling occurs at __________ pressure.

Heat Transfer A multiple effect evaporator as compared to a single effect evaporator of the same capacity has

Heat Transfer
The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is

Heat Transfer
Heat flux, as defined in heat flow is analogous to __________ in electricity flow.

Heat Transfer
Arithmetic mean area can be used in heat transfer problem to calculate the heat flow by conduction through a cylinder which is

Heat Transfer
In the equation Q = UAΔt; Δt is

Heat Transfer
Film boiling occurs at __________ pressure.

Heat Transfer
A multiple effect evaporator as compared to a single effect evaporator of the same capacity has