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?

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?

0.8

1

0.9

(0.8)0.5

0.8

1

0.9

(0.8)0.5

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

The tube bundle is suspended on bracket

It is used for high viscosity liquor having large rate of scaling

Downtake is formed by the annular space between the bundle and the shell

There is no central downtake

The tube bundle is suspended on bracket

It is used for high viscosity liquor having large rate of scaling

Downtake is formed by the annular space between the bundle and the shell

There is no central downtake

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Process Equipment and Plant Design
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

An increase in liquid viscosity

An increase in relatived volatility for rectification columns

Decrease in gas solubility for absorbers

All of these

An increase in liquid viscosity

An increase in relatived volatility for rectification columns

Decrease in gas solubility for absorbers

All of these

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Process Equipment and Plant Design
Liquid gradient over the tray results due to the

Large plate spacing

Large reflux ratio

Low gas velocity

Resistance offered to flow of liquids by caps & risers and the flow of gas

Large plate spacing

Large reflux ratio

Low gas velocity

Resistance offered to flow of liquids by caps & risers and the flow of gas

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Process Equipment and Plant Design
Two iron pipes of the same nominal diameter but different schedule numbers will have the same

Inside diameter

Outside diameter

None of these

Wall thickness

Inside diameter

Outside diameter

None of these

Wall thickness

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Process Equipment and Plant Design
In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σh are related by

No relation exists

σh = σL

σh = 2 σL

σh = σL/2

No relation exists

σh = σL

σh = 2 σL

σh = σL/2

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Process Equipment and Plant Design

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

Process Equipment and Plant Design An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

Process Equipment and Plant Design Liquid gradient over the tray results due to the

Process Equipment and Plant Design Two iron pipes of the same nominal diameter but different schedule numbers will have the same

Process Equipment and Plant Design In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σh are related by

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

Process Equipment and Plant Design
An increase in the liquid resistance to interphase mass transfer and a resultant reduction in plate efficiency is caused by

Process Equipment and Plant Design
Liquid gradient over the tray results due to the

Process Equipment and Plant Design
Two iron pipes of the same nominal diameter but different schedule numbers will have the same

Process Equipment and Plant Design
In a cylinderical vessel subjected to internal pressure, the longitudinal stress σL and the circumferential stress, σh are related by