101. In case of a simply supported I-section beam of span L and loaded with a central load W, the length of elasto-plastic zone of the plastic hinge, is_________________?
A. L/2
B. L/3
C. L/4
D. L/5
✅ The correct answer is option D.
Theory of Structures MCQs
102. A simply supported beam carries varying load from zero at one end and w at the other end. If the length of the beam is a, the maximum bending moment will be_______________?
A. wa/27
B. wa²/27
C. w²a
D. wa²
✅ The correct answer is option D.
103. The equivalent length is of a column of length having both the ends fixed, is_________________?
A. 2 L
B. L
C. L/2
D. L
✅ The correct answer is option C.
104. For determining the support reactions at A and B of a three hinged arch, points B and Care joined and produced to intersect the load line at D and a line parallel to the load line through A at D’. Distances AD, DD’ and AD’ when measured were 4 cm, 3 cm and 5 cm respectively. The angle between the reactions at A and B is___________________?
A. 30°
B. 45°
C. 60°
D. 90°
✅ The correct answer is option D.
105. A composite beam is composed of two equal strips one of brass and other of steel. If the temperature is raised___________________?
A. Steel experiences tensile force
B. Brass experiences compressive force
C. Composite beam gets subjected to a couple
D. All the above
✅ The correct answer is option D.
106. In case of principal axes of a section________________?
A. Sum of moment of inertia is zero
B. Difference of moment inertia is zero
C. Product of moment of inertia is zero
D. None of these
✅ The correct answer is option C.
107. The ratio of circumferential stress to the longitudinal stress in the walls of a cylindrical shell, due to flowing liquid, is__________________?
A. ½
B. 1
C. 1½
D. 2
✅ The correct answer is option D.
108. If a three hinged parabolic arch, (span l, rise h) is carrying a uniformly distributed load w/unit length over the entire span__________________?
A. Horizontal thrust is wl2/8h
B. S.F. will be zero throughout
C. B.M. will be zero throughout
D. All the above
✅ The correct answer is option D.
109. The ratio of maximum and average shear stresses on a rectangular section, is________________?
A. 1
B. 1.25
C. 1.5
D. 2.5
✅ The correct answer is option C.
110. The assumption in the theory of bending of beams is_________________?
A. Material is homogeneous
B. Material is isotropic
C. Young’s modulus is same in tension as well as in compression
D. All the above
✅ The correct answer is option D.