The bending moment at the centre of a simply supported beam with a gradually varying load from zero at both ends to w per metre at the centre is wl/4.
Options
A. Yes
B. No
Correct Answer
No
Strength of Materials problems
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1. The extension of a circular bar tapering uniformly from diameter d1 at one end to diameter d2 at the other end, and subjected to an axial pull of P is given by
2. The horizontal thrust offered by the retaining wall on the retained material is (where w = Specific weight of the retained material, h = height of retaining wall, and (?) = Angle of repose of the retained earth)
3. When a body is subjected to bi-axial stress i.e. direct stresses (?x) and (?y) in two mutually perpendicular planes accompanied by a simple shear stress (?xy), then maximum normal stress is
4. A thin cylindrical shell of diameter (d) length (l) and thickness (t) is subjected to an internal pressure (p). The longitudinal stress in the shell is
5. The tensile strength of the welded joint for double fillet is (where s = Leg or size of the weld, l = Length of weld, and ?t = Allowable tensile stress for weld metal)
Correct Answer: maximum at the inner surface and minimum at the outer surface
9. In order to avoid tearing off the plate at an edge, the distance from the centre of the rivet hole to the nearest edge of the plate (i.e. margin) should be (where d = Diameter of rivet hole in mm)
10. When a body is subjected to bi-axial stress i.e. direct stresses (?x) and (?y) in two mutually perpendicular planes accompanied by a simple shear stress (?xy), then minimum normal stress is
