For a counter current heat exchanger with Tih = 80°C, T°c = 60°C, T°h = 50°C and Tic = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy

Heat Transfer
For a counter current heat exchanger with Tih = 80°C, T°c = 60°C, T°h = 50°C and Tic = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy

dT/dZ = 0

d²T/dZ² < 0

d²T/dZ² = 0

d²T/dZ² > 0

dT/dZ = 0

d²T/dZ² < 0

d²T/dZ² = 0

d²T/dZ² > 0

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Heat Transfer
Fouling factor

Does not provide a safety factor for design

None of these

Is a dimensionless quantity

Accounts for additional resistances to heat flow

Does not provide a safety factor for design

None of these

Is a dimensionless quantity

Accounts for additional resistances to heat flow

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Heat Transfer
Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is

0.6

0.2

0.8

0.4

0.6

0.2

0.8

0.4

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

Keeping the heat transfer surface clean

Increasing the tube length

Enhancing the fluid pumping rate

None of these

Keeping the heat transfer surface clean

Increasing the tube length

Enhancing the fluid pumping rate

None of these

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Heat Transfer
Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator?

Calenderia vertical tube evaporator

Long vertical evaporator

Horizontal tube evaporator

Agitated film evaporator

Calenderia vertical tube evaporator

Long vertical evaporator

Horizontal tube evaporator

Agitated film evaporator

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Heat Transfer
Economy of a multiple effect evaporator is not influenced much by the

boiling point elevations

rate of heat transfer

ratio of the weight of the thin liquor to thick liquor

temperature of the feed

boiling point elevations

rate of heat transfer

ratio of the weight of the thin liquor to thick liquor

temperature of the feed

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Heat Transfer

Heat Transfer For a counter current heat exchanger with Tih = 80°C, T°c = 60°C, T°h = 50°C and Tic = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy

Heat Transfer Fouling factor

Heat Transfer Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is

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

Heat Transfer Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator?

Heat Transfer Economy of a multiple effect evaporator is not influenced much by the

Heat Transfer
For a counter current heat exchanger with Tih = 80°C, T°c = 60°C, T°h = 50°C and Tic = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy

Heat Transfer
Fouling factor

Heat Transfer
Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is

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

Heat Transfer
Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator?

Heat Transfer
Economy of a multiple effect evaporator is not influenced much by the