BSNL JTO (CE) Paper 2009 with Solutions Explanations at Doorsteptutor. Com Part 4

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40. A solid circular shaft (length L) is fixed at one end and free at the other is subjected to uniform torque T and bending moment M along its length. If Poisson՚s ratio of the material is 0.25, strain energy of the shaft can be expressed as

a.

b.

c.

d.

41. A beam of rectangular cross section is to be made from a cylindrical log of wood of diameter D. The strongest cross section of the rectangular beam that can be made should have dimension

a.

b.

c.

d.

42. A plane rigid jointed steel frame with fixed supports is acted upon by a couple M as shown below. In order to find moment induced at the fixed supports, moment distribution was carried out. The ratio of moment at support A to that at B is

Plane with Fixed Supports

a.

b.

c.

d.

43. A propped cantilever of span 3L is having plastic moment carrying capacity Mp. It carries

a concentrated load at a distance of L from the fixed end. Collapse load for the beam is

a.

b.

c.

d.

44. In a RC beam of rectangular cross section (breadth ; effective depth ) , vertical stirrups 2-legged 8 mm diameter are provided at a spacing of . Given, cross sectional area of bar , and design shear strength of concrete is , total shear capacity of the section will be

a.

b.

c.

d.

45. A beam of length L is fixed at both ends. The beam carries uniformly distributed load of intensity w per unit length covering the entire span. The points of contra-flexure are at

a. L L 3 from both ends

2 7

b. L L 3 from both ends

2 6

c. L L 3 from both ends

2 8

d. L L from both ends

2 9

46. A steel column of hollow circular cross section (external diameter and internal diameter ) hinged at both ends is subjected to compressive load. If the length of the column is L and modulus of elasticity of steel is E, the critical stress of column according to Euler՚s formula will be

a.

b.

c.

d.

47. A rivet of diameter is used to connect thick plate. The permissible stress for rivet in shear and bearing are and , respectively. The difference of Rivet value in double and single shear is

a.

b.

c.

d.

48. A semicircular arch of radius R hinged at two ends and at the crown carries uniformly distributed load q per unit length. The normal thrust at the crown will be

a.

b.

c.

d.

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