Engineering - Civil Enginnering

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19.

A linear arch has                        
A. normal thrust only B. shear force only
C. bending moment only D. normal thrust and shear force



20.

A long column has maximum crippling load when its                        
A. both ends are hinged B. both ends are fixed
C. one end is fixed and other end is hinged D. one end is fixed and other end is free



21.

A portion of a beam between two sections is said to be in pure bending when there is                        
A. constant bending moment and zero shear force B. constant shear force and zero bending moment
C. constant bending moment and constant shear force D. none of the above




22.

A prismatic bar of volume V is subjected to a tensile force in longitudinal direction.If Poisson's ratio of the material is u and longitudinal strain is e, then the final volume of the bar becomes                        
A. (l + e)(l-u)2V B. (l-e)2(l + ue)V
C. (l + e)(l-ne)2V D. (l-ue)3V



23.

A prismatic bar when subjected to pure bending assumes the shape of                        
A. catenary B. cubic parabola
C. quadratic parabola D. arc of a circle



24.

A prismatic beam of length 1 and fixed at both ends carries a uniformly distributed load. The distance of points of contraflexure from either end is                        
A. 0.2071 B. 0.2111
C. 0.2771 D. 0.251



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