In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D₁ and D₂ are I.D. of inner and outer pipes)

Process Equipment and Plant Design
In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D₁ and D₂ are I.D. of inner and outer pipes)

D₂ - D₁

(D₂² - D₁²)/D₁²

(D₂² - D₁²)/D₂²

None of these

D₂ - D₁

(D₂² - D₁²)/D₁²

(D₂² - D₁²)/D₂²

None of these

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Process Equipment and Plant Design
In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for

Fixing the tubes

Increasing pressure drop

Reducing scale deposition

Creating turbulence

Fixing the tubes

Increasing pressure drop

Reducing scale deposition

Creating turbulence

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Process Equipment and Plant Design
The type of stress developed in a metallic bar on subjecting it to a change in temperature without allowing it to be deformed is __________ stress.

Compressive

Shear

Thermal

Tensile

Compressive

Shear

Thermal

Tensile

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Process Equipment and Plant Design
Liquid gradient over a tray can be minimised by

Using split flow, radial flow or cascade flow for column diameter large than 4 ft

Providing a higher skirt clearance or a higher weir

All of these

Decreasing the number of rows of caps through which the liquid flows or by decreasing the velocity of liquid flow past the caps or by reducing the distance along the tray through which the liquid must

Using split flow, radial flow or cascade flow for column diameter large than 4 ft

Providing a higher skirt clearance or a higher weir

All of these

Decreasing the number of rows of caps through which the liquid flows or by decreasing the velocity of liquid flow past the caps or by reducing the distance along the tray through which the liquid must

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Process Equipment and Plant Design
In perforated plate towers, the

Total hole area may be around 6 to 15% of tower cross-sectional area

All of these

Hole sizes may be around 1/8" or 3/16"

Pressure drop is less compared is similar bubble cap towers

Total hole area may be around 6 to 15% of tower cross-sectional area

All of these

Hole sizes may be around 1/8" or 3/16"

Pressure drop is less compared is similar bubble cap towers

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Process Equipment and Plant Design
Which of the following packing materials provides for maximum mass transfer?

Cross-partition rings

Lessig rings

All of these

Raschig rings

Cross-partition rings

Lessig rings

All of these

Raschig rings

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Process Equipment and Plant Design

Process Equipment and Plant Design In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D₁ and D₂ are I.D. of inner and outer pipes)

Process Equipment and Plant Design In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for

Process Equipment and Plant Design The type of stress developed in a metallic bar on subjecting it to a change in temperature without allowing it to be deformed is __________ stress.

Process Equipment and Plant Design Liquid gradient over a tray can be minimised by

Process Equipment and Plant Design In perforated plate towers, the

Process Equipment and Plant Design Which of the following packing materials provides for maximum mass transfer?

Process Equipment and Plant Design
In a double pipe concentric heat exchanger, the equivalent diameter of annulus for heat transfer would be (where, D₁ and D₂ are I.D. of inner and outer pipes)

Process Equipment and Plant Design
In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for

Process Equipment and Plant Design
The type of stress developed in a metallic bar on subjecting it to a change in temperature without allowing it to be deformed is __________ stress.

Process Equipment and Plant Design
Liquid gradient over a tray can be minimised by

Process Equipment and Plant Design
In perforated plate towers, the

Process Equipment and Plant Design
Which of the following packing materials provides for maximum mass transfer?