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43.

Euler's formula for a mild steel long column hinged at both ends is not valid for slenderness ratio                        


A. greater than 80 B. less than 80
C. greater than 180 D. greater than 120




44.

For a determinate pin-jointed plane frame, the relation between the number of joints j and members m is given by                        


A. m = 2j - 3 B. m = 3j-6
C. m > 2j - 3 D. m > 3j - 6




45.

For an isotropic, homogeneous and elastic material obeying Hooke's law, number of independent elastic constants is                        


A. 2 B. 3
C. 9 D. 1




46.

For ductile materials, the most appropriate failure theory is                        


A. maximum shear stress theory B. maximum principal stress theory
C. maximum principal strain theory D. shear strain energy theory




47.

For no torsion, the plane of bending should                        


A. be parallel to one of the principal axes B. pass through shear centre of section
C. pass through neutral axis of the section D. pass through centre of gravity of the section




48.

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


A. Mohr's theory B. Rankine's theory
C. Maximum strain theory D. Maximum shear energy theory




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