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

Steam is fed to the shell, whereas the liquor is filled inside the tube
Tube dia is 3-6 cms, while tube length in 3-6 metres
None of these
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
For a cylindrical shell, (subject to the thickness of uppermost course being more than the minimum for diaofthe tank in question), the thickness of the courses of shell

Remains same throughout
Increases upwards
May decrease or increase upwards depending upon whether vacuum or positive pressure would be maintained inside the shell
Decreases upwards

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Process Equipment and Plant Design
The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles?

To increase the tube side heat transfer co-efficient by inducing turbulence
To increase the residence time of shell side fluid
To reduce the induced vibration in the tubes
To provide support to the tube bundle

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