In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is __________ the outlet temperature of the cold fluid.

Heat Transfer
In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is __________ the outlet temperature of the cold fluid.

Equal to

Less than

More than

Either more or less than (depending upon the fluid)

Equal to

Less than

More than

Either more or less than (depending upon the fluid)

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Heat Transfer
At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical?

1

> 1

< 1

None of these

1

> 1

< 1

None of these

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Heat Transfer
Which of the following has the highest thermal conductivity ?

Black

Silver

Water

Air

Black

Silver

Water

Air

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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 temperature follows __________ law.

Hyperbolic

Linear

Parabolic

Logarithmic

Hyperbolic

Linear

Parabolic

Logarithmic

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Heat Transfer
Calburn analogy is applicable for the value of Prandtl number from

120 to 400

0.6 to 120

0.5 to 5

0.001 to 1

120 to 400

0.6 to 120

0.5 to 5

0.001 to 1

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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 shell side pressure drop

Higher shell side heat transfer co-efficient

Lower tube side pressure drop

Higher tube side heat transfer co-efficient

Lower shell side pressure drop

Higher shell side heat transfer co-efficient

Lower tube side pressure drop

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Heat Transfer

Heat Transfer In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is __________ the outlet temperature of the cold fluid.

Heat Transfer At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical?

Heat Transfer Which of the following has the highest thermal conductivity ?

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 temperature follows __________ law.

Heat Transfer Calburn analogy is applicable for the value of Prandtl number from

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 case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is __________ the outlet temperature of the cold fluid.

Heat Transfer
At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical?

Heat Transfer
Which of the following has the highest thermal conductivity ?

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 temperature follows __________ law.

Heat Transfer
Calburn analogy is applicable for the value of Prandtl number from

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