Process Equipment and Plant Design
In a shell and tube heat exchanger, the clearance of the tube is generally

Not less than one-fourth of the tube diameter or 3/16"
More than the tube diameter
More in case of triangular pitch as compared to the square pitch tube layout
Equal to the tube diameter

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

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

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