Overall distillation column efficiency for most of the refinery columns can be given by (for μ = 0.07 - 1.4 cp and relative volatility < 4) (where η = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi)

Process Equipment and Plant Design
Overall distillation column efficiency for most of the refinery columns can be given by (for μ = 0.07 - 1.4 cp and relative volatility < 4) (where η = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi)

Η = 24.6 (Δp/μ)

Η = 1.66 - 0.25 log μ

Η = 17 - 61.1 log μ

Η = 0.25 log μ - 1.67

Η = 24.6 (Δp/μ)

Η = 1.66 - 0.25 log μ

Η = 17 - 61.1 log μ

Η = 0.25 log μ - 1.67

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Process Equipment and Plant Design
A binary liquid azeotropic mixture has boiling point lower than either of the components, when it shows __________ deviation from Raoult's Law.

None of these

No

Positive

Negative

None of these

No

Positive

Negative

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Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of a long tube vertical evaporator.

None of these

Tube dia is 3-6 cms, while tube length in 3-6 metres

Steam is fed to the shell, whereas the liquor is filled inside the tube

Liquor level is maintained at l/3rd to 1/2 of the height of the tube

None of these

Tube dia is 3-6 cms, while tube length in 3-6 metres

Steam is fed to the shell, whereas the liquor is filled inside the tube

Liquor level is maintained at l/3rd to 1/2 of the height of the tube

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Process Equipment and Plant Design
Pick out the wrong statement about the design of seive plate column and the bubble cap column.

The downcomer design and the residence time in the downcomer is almost same for seive plate and bubble cap columns

Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the seive plate

Weir length for a bubble cap plate is the same as that for the seive plate

Weir height for a bubble cap plate column is the same as that for a seive plate column

The downcomer design and the residence time in the downcomer is almost same for seive plate and bubble cap columns

Weir height in case of a bubble cap plate ranges from 50 to 150 mm and is higher than the seive plate

Weir length for a bubble cap plate is the same as that for the seive plate

Weir height for a bubble cap plate column is the same as that for a seive plate column

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Process Equipment and Plant Design
Value of Peclet number = ∞, is the representative of

Eddy diffusivity = 0

Plug flow

Laminar flow

Complete back mixing

Eddy diffusivity = 0

Plug flow

Laminar flow

Complete back mixing

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Process Equipment and Plant Design
The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.

Ellipsoidal

Torispherical

Flat plate

Hemispherical

Ellipsoidal

Torispherical

Flat plate

Hemispherical

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Process Equipment and Plant Design

Process Equipment and Plant Design A binary liquid azeotropic mixture has boiling point lower than either of the components, when it shows __________ deviation from Raoult's Law.

Process Equipment and Plant Design Pick out the wrong statement pertaining to the design of a long tube vertical evaporator.

Process Equipment and Plant Design Pick out the wrong statement about the design of seive plate column and the bubble cap column.

Process Equipment and Plant Design Value of Peclet number = ∞, is the representative of

Process Equipment and Plant Design The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.

Process Equipment and Plant Design
A binary liquid azeotropic mixture has boiling point lower than either of the components, when it shows __________ deviation from Raoult's Law.

Process Equipment and Plant Design
Pick out the wrong statement pertaining to the design of a long tube vertical evaporator.

Process Equipment and Plant Design
Pick out the wrong statement about the design of seive plate column and the bubble cap column.

Process Equipment and Plant Design
Value of Peclet number = ∞, is the representative of

Process Equipment and Plant Design
The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.