Process Equipment and Plant Design
Practical dividing line between a ductile and brittle materials is suggested, when the ultimate elongation is about 5%. Generally, larger the knuckle radius, stronger is the corner torus section of a head. The knuckle radius provided should be less than __________ of the head.

6% of I.D.
Either A or B, whichever is smaller
3 times the thickness
Either A or B, whichever is larger

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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
Lower flow rate fluid 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

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