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 = 17 - 61.1 log μ

Η = 1.66 - 0.25 log μ

Η = 24.6 (Δp/μ)

Η = 0.25 log μ - 1.67

Η = 17 - 61.1 log μ

Η = 1.66 - 0.25 log μ

Η = 24.6 (Δp/μ)

Η = 0.25 log μ - 1.67

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Process Equipment and Plant Design
The safe height (h) to diameter (d) ratio (i.e., h/d) for liquid/petro fuel storage tank of capacity more than 45 kilolitres is less than

1

2

3

3.5

1

2

3

3.5

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

It is unsuitable for concentrating those liquids, which form a scale or deposit salt

It is suitable for process, in which the final product is a liquor instead of solid

Its usual dimensions are: tube dia = 2-3 cms; evaporator body dia = 1-4 metres and evaporator height = 2.5-4 metres

Liquor flows inside the tube, while the steam is outside submerging the tube

It is unsuitable for concentrating those liquids, which form a scale or deposit salt

It is suitable for process, in which the final product is a liquor instead of solid

Its usual dimensions are: tube dia = 2-3 cms; evaporator body dia = 1-4 metres and evaporator height = 2.5-4 metres

Liquor flows inside the tube, while the steam is outside submerging the tube

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Process Equipment and Plant Design
Bubble cap plate column is

A finite stage contactor

Used only for distillation, not for absorption

A continuous contactor

A differential stage contactor

A finite stage contactor

Used only for distillation, not for absorption

A continuous contactor

A differential stage contactor

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Process Equipment and Plant Design
Le/D for a Tee (used as elbow, entering branch) would be

More than that for Tee (used as elbow, entering run)

Both B and C

Around 90

Less than that for Tee (used as elbow, entering run)

More than that for Tee (used as elbow, entering run)

Both B and C

Around 90

Less than that for Tee (used as elbow, entering run)

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Process Equipment and Plant Design
In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.

15

2.5

20

7.5

15

2.5

20

7.5

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Process Equipment and Plant Design

Process Equipment and Plant Design The safe height (h) to diameter (d) ratio (i.e., h/d) for liquid/petro fuel storage tank of capacity more than 45 kilolitres is less than

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

Process Equipment and Plant Design Bubble cap plate column is

Process Equipment and Plant Design Le/D for a Tee (used as elbow, entering branch) would be

Process Equipment and Plant Design In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.

Process Equipment and Plant Design
The safe height (h) to diameter (d) ratio (i.e., h/d) for liquid/petro fuel storage tank of capacity more than 45 kilolitres is less than

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

Process Equipment and Plant Design
Bubble cap plate column is

Process Equipment and Plant Design
Le/D for a Tee (used as elbow, entering branch) would be

Process Equipment and Plant Design
In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.