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

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

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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
Liquor level is maintained at l/3rd to 1/2 of the height of the tube
Steam is fed to the shell, whereas the liquor is filled inside the tube
None of these

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