Process Equipment and Plant Design
Ratio of tube length to shell diameter for a shell and tube heat exchanger is

8 : 1 to 12 : 1 for both liquid-liquid and gas-gas heat exchangers
4 : 1 to 8 : 1 for liquid-liquid exchanger
< 4 : 1 for gas-gas exchangers
Both B & C

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Process Equipment and Plant Design
Pick out the wrong statement about routing of fluids in a shell and tube heat exchanger.

Higher pressure fluid stream should be routed through the shell side
The viscous fluid should be routed through the shell side
The corrosive and fouling fluid should be preferably routed through the tubes
Lower flow rate fluid should be routed through the shell side

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