Civil Engineering – Strength of Materials Mock test – 3 Welcome to your Strength of Materials Mock test - 3 Take an exciting test in Strength of Materials You have only 20 mins to complete the test (27 Questions) Wish you all the best!!! Name Email 1) To ascertain the maximum permissible eccentricity of loads on circular columns, the rule generally followed, is A. middle half rule of columns B. middle third rule of columns C. middle fourth rule of columns D. none of these.2) If the width of a simply supported beam carrying an isolated load at its centre is doubled, the deflection of the beam at the centre is changed by A. 2 times B. 4 times C. 8 times D. 1/2 times E. 3 times.3) In a solid arch, shear force acts A. vertically upwards B. along the axis of the arch C. perpendicular to the axis of arch D. tangentially to the arch4) The neutral axis of a beam cross-section must A. pass through the centroid of the section B. be equidistant from the top of bottom films C. be an axis of symmetry of the section D. none of these.5) The bending moment is maximum on a section where shearing force A. is maximum B. is minimum C. is equal D. changes sign.6) As the elastic limit reaches, tensile strain A. increases more rapidly B. decreases more rapidly C. increases in proportion to the stress D. decreases in proportion to the stress.7) A beam of length L supported on two intermediate rollers carries a uniformly distributed load on its entire length. If sagging B.M. and hogging B.M. of the beam are equal, the length of each overhang, is A. 0.107 L B. 0.207 L C. 0.307 L D. 0.407 L E. 0.5 L.8) If the beam is supported so that there are only three unknown reactive elements at the supports. These can be determined by using the following fundamental equation of statics A. ∑H = 0; B. ∑V = 0 C. ∑H = 0 ∑H = 0 D. ∑H = 0; ∑V = 0; ∑M = 0 E. ∑M = 0; ∑H = 09) A long vertical member, subjected to an axial compressive load, is called A. a column B. a strut C. a tie D. a stanchion E. all the above.10) When a rectangular beam is loaded transversely, the maximum compressive stress develops on A. bottom fibre B. top fibre C. neutral axis D. every cross-section.11) For a cantilever with a uniformly distributed load W over its entire length L, the maximum bending moment is A. WL B. 1/2WL C. 1/3WL D. 1/3W^2L12) The property of a material by which it can be drawn to a smaller section, due to tension, is called A. plasticity B. ductility C. elasticity D. malleability.13) For keeping the stress wholly compressive the load may be applied on a circular column anywhere within a concentric circle of diameter A. d/2 B. d/3 C. d/4 D. d/814) The distance between the centres of adjacent rivets in the same row, is called A. pitch B. lap C. gauge D. staggered pitch.15) For a stable frame structure, number of members required, is A. three times the number of joints minus three B. twice the number of joints minus three D. twice the number of joints minus one C. twice the number of joints minus two E. none of these.16) The section modulus of a rectangular section is proportional to A. area of the section B. square of the area of the section C. product of the area and depth D. product of the area and width17) Shear force for a cantilever carrying a uniformly distributed load over its length, is A. triangle B. rectangle C. parabola D. cubic parabola.18) The following assumption is not true in the theory of pure torsion : A. The twist along the shaft is uniform B. The shaft is of uniform circular section throughout C. Cross-section of the shaft, which is plane before twist remains plane after twist D. All radii get twisted due to torsion.19) Every material obeys the Hooke's law within its A. elastic limit B. plastic point C. limit of proportionality D. none of these.20) The property by which a body returns to its original shape after removal of the force, is called A. plasticity B. elasticity C. ductility D. malleability.21) If the stress produced by a prismatic bar is equal to the working stress, the area of the cross-section of the prismatic bar, becomes A. zero B. infinite C. maximum D. minimum.22) The ratio of the effective length of a column and minimum radius of gyration of its cross-sectional area, is known A. buckling factor B. slenderness ratio C. crippling factor D. none of these.23) The moment diagram for a cantilever whose free end is subjected to a bending moment, will be a A. triangle B. rectangle C. parabola D. cubic parabola.24) Columns of given length, cross-section and material have different values of buckling loads for different end conditions. The strongest column is one whose A. one end is fixed and other end is hinged B. both ends are hinged or pin jointed C. one end is fixed and the other end entirely free D. both the ends are fixed E. none of the these.25) A member is balanced at its end by two inclined members carrying equal forces. For equilibrium the angle between the inclined bars must be A. 3° B. 45° C. 60° D. 90° E. 120°26) Beams of uniform strength are preferred to those of uniform section because these are economical for A. large spans B. heavy weights C. light weights D. short spans.27) Pick up the correct statement from the following : A. The rate of change of bending moment is equal to rate of shear force B. The rate of change of shear force is equal to rate of loading C. neither (a) nor (b) D. both (a) and (b).