21) ‘If an internal stress component like shear force, bending moment or reaction component is allowed to act through a small distance thereby causing deformation of the structure, the curve of the deformed shape represents to some scale, the influence line diagram for that stress or the reaction component. The above statement is known as
(a) Mecaulay’s theorem
(b) Müller–Breslau principle
(c) Castigliano’s theorem
(d) Maxwell’s theorem
22) The point in the cross section of beam through which if load acts there will not be any twisting of the beam but there will be only bending is known as
(a) centre of gravity
(b) centroid
(c) shear centre
(d) all the above
23) The absolute bending moment in a simply supported beam of span 10 m due to a moving load of 40 kN/m spanning over 5 m is
(a) 375 kN m at 2.5 m from end A
(b) 375 kN m at midpoint
(c) 375 kN m at 3.75 m from end A
(d) 500 kN m at midspan
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