Strength of Materials Online Test – Multiple Choice Questions & Answers 1. If the length of a cantilever carrying an isolated load at its free end is doubled, the deflection of the free end will increase by 2 3 8 1/8 2. The stress necessary to initiate yielding, is considerably more than that necessary to stop it more than that necessary to continue it less than that necessary to continue it less than that necessary to stop it 3. For a beam, if fundamental equations of statics are not sufficient to determine all the reactive forces at the supports, the structure is said to be determinate statically determinate statically indeterminate none of these 4. The phenomenon of slow growth of strain under a steady tensile stress, is called yielding breaking none of these creeping 5. For the same height, the bottom width for no tension for triangular section is more than rectangular section for rectangular section is more than triangular section for triangular section is same as that of a rectangular section none of these 6. The bending moment is maximum on a section where shearing force is maximum changes sign is equal is minimum 7. If the depth of a simply supported beam carrying an isolated load at its centre, is doubled, the deflection of the beam at the centre will be changed by a factor of 2 4 8 1/8 8. Strain energy of any member may be defined as work done on it to deform it to resist elongation to resist shortening All 9. The areas of cross-section of a square beam and a circular beam subjected to equal bending moments, are same both the beams are equally strong both the beams are equally economical square beam is more economical circular beam is more economical 10. The moment diagram for a cantilever carrying linearly varying load from zero at its free end and to maximum at the fixed end will be a rectangle cubic parabola parabola triangle 11. A cast iron T section beam is subjected to pure bending. For maximum compressive stress to be three times the maximum tensile stress, centre of gravity of the section from flange side is h/2 h/3 h/4 2/3h 12. When two plates butt together and are riveted with two cover plates with two rows of rivets, the joint is known as lap joint double riveted double cover butt joint butt join single riveted single cover butt joint 13. Ties are load carrying members of a frame, which are subjected to transverse loads torsional loads axial compressive loads axial tension loads 14. The effect of arching a beam, is to increase the bending moment throughout nothing on the bending throughout to reduce the bending moment throughout All 15. The moment diagram for a cantilever which is subjected to a uniformly distributed load will be a parabola rectangle triangle cubic parabola 16. The value of Poisson’s ratio always remains less than one greater than one equal to one none of these 17. Hooke’s law states that stress and strain are directly proportional curvilinearly related inversely proportional none of these 18. The rise of a parabolic arch at quarter points, is equal to 3/4 times the rise of the crown 2/3 times the rise of the crown 1/3 times the rise of the crown 1/2 times the rise of the crown 19. A column is said to be of medium size if its slenderness ratio is between 20 and 32 32 and 120 120 and 160 160 and 180 20. For a beam having fixed ends, the unknown element of the reactions, is horizontal and vertical components at both the ends vertical components at either end horizontal components at either end horizontal component at one end and vertical component at the other Loading … Question 1 of 20
