For the following questions answer them individually
A bar of square section of area $$a^2$$ is held such that one of its diameters is vertical. The maximum shear stress will develop at a depth h where h is
If $$I_x$$ and $$I_Y$$ are the moments of inertia of a section about X and Y axes, the polar moment of inertia of the section is
In the truss shown below, the force in member DC is

The force in BF of the truss shown in figure below is

Pick up the incorrect statement from the following:
The torsional resistance of a shaft is directly proportional to
If the strain energy stored per unit volume in a hollow shaft subjected to a pure torque when t attains maximum shear stress fs is (17 fs)/(64 N), the ratio of the inner diameter to outer diameter is
The maximum height of a masonry dam of a triangular section whose base width is b and specific gravity s is
The locus of reaction of a two-hinged semi-circular arch is
The ratio of circumferential stress to the longitudinal stress in the walls of a cylindrical shell, due to flowing liquid, is
The equivalent length of a column of length L having one end fixed at the other end hinged is