6.If a three hinged parabolic arch carries a uniformly distributed load over the entire span, then any section of the arch is subjected to

7.At a point in a steel member, the major principal stress is 2000 kg/cm2 and the minor principal stress is compressive. If the uni-axial tensile yield stress is 2500 kg/cm2, then the magnitude of the minor principal stress at which yielding will commence, according to the maximum shearing stress theory, is

8.For the design of a cast iron member, the most appropriate theory of failure is

9.The basic perfect frame is a

10.A three hinged arch is carrying uniformly distributed load over the entire span. The arch is free from shear force and bending moment if its shape is