389) In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always

390) Sinking of an intermediate support of a continuous beam i) reduces the negative moment at support ii) increases the negative moment at support iii) reduces the positive moment at center of span iv) increases the positive moment at center of span The correct answer is

391) The maximum value of hoop compression in a dome is given by [where, w = load per unit area of surface of dome R = radius of curvature d = thickness of dome]

392) In a spherical dome the hoop stress due to a concentrated load at crown is

393) In a ring beam subjected to uniformly distributed load i) shear force at mid span is zero ii) shear force at mid span is maximum iii) torsion at mid span is zero iv) torsion at mid span is maximum The correct answer is