Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.

Process Equipment and Plant Design
Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.

Plate tower is preferred over packed tower, if the operation involves liquids containing dispersed solids

Plate tower is perferred, if interstage cooling is required to remove heats of reaction or solution

The total weight of a dry plate tower is usually much more than that of a dry packed tower designed for the same duty

In operations involving large temperature changes. (e.g. distillation), plate towers are preferred over packed towers as the packing may be crushed due to large temperature changes

Plate tower is preferred over packed tower, if the operation involves liquids containing dispersed solids

Plate tower is perferred, if interstage cooling is required to remove heats of reaction or solution

The total weight of a dry plate tower is usually much more than that of a dry packed tower designed for the same duty

In operations involving large temperature changes. (e.g. distillation), plate towers are preferred over packed towers as the packing may be crushed due to large temperature changes

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Process Equipment and Plant Design
For a cylinderical vessel of moderate height, the weld joint efficiency for joints parallel to the cylinderical axis is given as 1.0, while for joints along the girth (circumference) it is given as 0.8. In calculating the shell wall thickness using code formula for an internally pressurised cylinderical vessel, what value of weld joint efficiency should be used?

1

0.8

(0.8)0.5

0.9

1

0.8

(0.8)0.5

0.9

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Process Equipment and Plant Design
In the design of a shell and tube heat exchanger, the corrosion allowance

Need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc

All of these

For internal cover and tube sheet is provided on both the sides

For carbon steel and cast iron pressure parts is 1.5 mm (except for tubes) and for severe conditions it is 3 mm

Need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc

All of these

For internal cover and tube sheet is provided on both the sides

For carbon steel and cast iron pressure parts is 1.5 mm (except for tubes) and for severe conditions it is 3 mm

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Process Equipment and Plant Design
In a shell and tube heat exchanger having square pitch, the shell side equivalent diameter is given by (where, P = pitch, d = outside diameter of the tube)

4(P² - πd²/4)/πd

Πd/4P²

(P² - πd²/4)/πd

4P²/πd

4(P² - πd²/4)/πd

Πd/4P²

(P² - πd²/4)/πd

4P²/πd

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Process Equipment and Plant Design
The LMTD correction factor (FT) is defined as the

Differenced of true temperature difference and the LMTD

Ratio of LMTD to the true temperature difference

Ratio of true temperature difference to the LMTD

Geometric mean of the true temperature difference and the LMTD

Differenced of true temperature difference and the LMTD

Ratio of LMTD to the true temperature difference

Ratio of true temperature difference to the LMTD

Geometric mean of the true temperature difference and the LMTD

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Process Equipment and Plant Design
__________ dished head is the strongest of all.

Elliptical

None of these

Torispherical

Hemispherical

Elliptical

None of these

Torispherical

Hemispherical

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Process Equipment and Plant Design

Process Equipment and Plant Design Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.

Process Equipment and Plant Design In the design of a shell and tube heat exchanger, the corrosion allowance

Process Equipment and Plant Design In a shell and tube heat exchanger having square pitch, the shell side equivalent diameter is given by (where, P = pitch, d = outside diameter of the tube)

Process Equipment and Plant Design The LMTD correction factor (FT) is defined as the

Process Equipment and Plant Design __________ dished head is the strongest of all.

Process Equipment and Plant Design
Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.

Process Equipment and Plant Design
In the design of a shell and tube heat exchanger, the corrosion allowance

Process Equipment and Plant Design
In a shell and tube heat exchanger having square pitch, the shell side equivalent diameter is given by (where, P = pitch, d = outside diameter of the tube)

Process Equipment and Plant Design
The LMTD correction factor (FT) is defined as the

Process Equipment and Plant Design
__________ dished head is the strongest of all.