31. The maximum magnitude of shear stress due to shear force F on a rectangular section of area A at the neutral axis, is__________________?
A. F/A
B. F/2A
C. 3F/2A
D. 2F/3A
✅ The correct answer is option C.
Theory of Structures MCQs
32. For beams of uniform strength, if depth is constant______________?
A. Width b M
B. Width b M
C. Width b 3 M
D. Width b 1/M
✅ The correct answer is option A.
33. Maximum strain theory for the failure of a material at the elastic limit, is known as_______________?
A. Guest’s or Trecas’ theory
B. St. Venant’s theory
C. Rankine’s theory
D. Haig’s theory
✅ The correct answer is option B.
34. Maximum principal stress theory for the failure of a material at elastic point, is known________________?
A. Guest’s or Trecas’ theory
B. St. Venant’s theory
C. Rankine’s theory
D. Von Mises’ theory
✅ The correct answer is option C.
35. A truss containing j joints and m members, will be a simple truss if_________________?
A. m = 2j – 3
B. j = 2m – 3
C. m = 3j – 2
D. j = 3m – 2
✅ The correct answer is option A.
36. The equivalent length of a column of length L, having both the ends hinged, is_______________?
A. 2L
B. L
C. L/2
D. L
✅ The correct answer is option B.
37. Stress may be defined as_________________?
A. Force per unit length
B. Force per unit volume
C. Force per unit area
D. None of these
✅ The correct answer is option C.
38. A simply supported beam which carries a uniformly distributed load has two equal overhangs. To have maximum B.M. produced in the beam least possible, the ratio of the length of the overhang to the total length of the beam, is_________________?
A. 0.207
B. 0.307
C. 0.407
D. 0.508
✅ The correct answer is option A.
39. P = / L² is the equation for Euler’s crippling load if_________________?
A. Both the ends are fixed
B. Both the ends are hinged
C. One end is fixed and other end is free
D. One end is fixed and other end is hinged
✅ The correct answer is option B.
40. The force in BC of the truss shown in the given figure, is___________________?
A. 3.0 t compression
B. 3.0 t tension
C. t tension
D. t compression
✅ The correct answer is option C.