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Chemical Engineering Basics - Engineering

Q1:

The ratio of the shear stress to the principal stress on a principal plane is

A 0

B 1

C 1/2

D 1/3

ANS:A - 0

On a principal plane, the shear stress is zero because the principal planes are planes of pure normal stress. Therefore, the ratio of the shear stress to the principal stress on a principal plane is 0.