A thin cylindrical vessel of mean diameter $$D$$ and of length $$'L'$$ closed at both the ends is subjected to a water pressure $$'P'$$. The value of hoop stress and longitudinal stress in the shell shall be respectively.

For a given shear force across a symmetrical $$'{\rm I}'$$ section the intensity of shear stress is maximum at the

A beams having a double cantilever attached at mid span is showing in the figure. The nature of forces in beam $$'ab'$$ is

The maximum value of Poisson's ratio for an elastic material is