Process Equipment and Plant Design
The most common standard size of bubble caps used in industrial operation is

1" dia cap with 0.5" dia riser
4" dia cap with 8" dia riser
8" dia cap with 1" dia riser
6" dia cap with 4" dia riser

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

Liquor level is maintained at l/3rd to 1/2 of the height of the tube
Tube dia is 3-6 cms, while tube length in 3-6 metres
None of these
Steam is fed to the shell, whereas the liquor is filled inside the tube

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