Process Equipment and Plant Design
Of the pressure vessels, with same thickness but different diameters, which one withstands higher pressure?

Strength of the vessel is same irrespective of the diameter
Larger dia long vessel
Smaller dia vessel
Larger dia vessel

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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.

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

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Process Equipment and Plant Design
The function of manholes provided in the shell of a distillation column is to

Guard against foaming & entrainment by dumping antifoaming agent through it
Give access to the individual trays for cleaning, maintenance and installation
All of these
Keep a check on the liquid gradient over the plate by direct visual observation

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