Strength of Materials Mock test – 5 || Civil Engineering Mock tests Welcome to your Strength of Materilas Mock test - 5 Take an exciting test in Strength of Materials You have only 20 mins to complete the test (25 Questions) Wish you all the best!!! Name Email 1. An open-ended cylinder of radius and thickness is subjected to internal pressure . The Young's modulus for the material is and Poisson's ratio is . The longitudinal strain is (A) Zero (B) pr/TE (C) pr/2TE (D) None of these2. A short masonry pillar is 60 cm x 60 cm in cross-section, the core of the pillar is a square whose side is (A) 17.32 cm (B) 14.14 cm (C) 20.00 cm (D) 22.36 cm3. A steel rod of 2 cm diameter and 5 metres long is subjected to an axial pull of 3000 kg. If E = 2.1 × 10^6, the elongation of the rod will be (A) 2.275 mm (B) 0.2275 mm (C) 0.02275 mm (D) 2.02275 mm4. 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 these5. At either end of a plane frame, maximum number of possible transverse shear forces, are (A) One (B) Two (C) Three (D) Four6. 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 H = 0 (D) H V M = 07. In a square beam loaded longitudinally, shear develops (A) On middle fibre along horizontal plane (B) On lower fibre along horizontal plane (C) On top fibre along vertical plane (D) Equally on each fibre along horizontal plane8. The maximum compressive stress at the top of a beam is 1600 kg/cm2 and the corresponding tensile stress at its bottom is 400 kg/cm2. If the depth of the beam is 10 cm, the neutral axis from the top, is (A) 2 cm (B) 4 cm (C) 6 cm (D) 8 cm9. The equivalent length of a column fixed at one end and free at the other end, is (A) 0.5 l (B) 0.7 l (C) 2 l (D) 1.5 l10. 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 these11. If the stress in each cross-section of a pillar is equal to its working stress, it is called (A) Body of equal (B) Body of equal section (C) Body of equal strength (D) None of these12. For a given material, if E, C, K and m are Young's modulus, shearing modulus, bulk modulus and Poisson ratio, the following relation does not hold good (A) E = 9KC/3K + C (B) E = 2K (1 + 2/m) (C) E = 2C (1 + 1/m) (D) E = 3C (1 - 1/m)13. For a cantilever with a uniformly distributed load W over its entire length L, the maximum bending moment is (A) WL (B) ½ WL (C) WL (D) ½ WL^214. Every material obeys the Hooke's law within its (A) Elastic limit (B) Plastic point (C) Limit of proportionality (D) None of these15. A shaft 9 m long is subjected to a torque 30 t-m at a point 3 m distant from either end. The reactive torque at the nearer end will be (A) 5 tonnes metre (B) 10 tonnes metre (C) 15 tonnes metre (D) 20 tonnes metre16. 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 (A) 8 (B) 1/8 (C) 1/3 (D) 217. A rectangular log of wood is floating in water with a load of 100 N at its centre. The maximum shear force in the wooden log is (A) 50 N at each end (B) 50 N at the centre (C) 100 N at the centre (D) None of these18. The maximum deflection of a simply supported beam of length L with a central load W, is (A) WL²/48EI (B) W²L/24EI (C) WL3/48EI (D) WL²/8EI19. Maximum deflection of a cantilever due to pure bending moment M at its free end, is (A) ML²/3EI (B) ML²/4EI (C) ML²/6EI (D) ML²/2EI20. Rankine-Golden formula accounts for direct as well as buckling stress and is applicable to (A) Very long columns (B) Long columns (C) Short columns (D) Intermediate columns21. The phenomenon of slow growth of strain under a steady tensile stress, is called (A) Yielding (B) Creeping (C) Breaking (D) None of these22. If is the internal pressure in a thin cylinder of diameter and thickness, the developed hoop stress, is (A) pd/2t (B) pd/4t (C) pd/t (D) 2pd/t23. The ratio of the maximum deflection of a cantilever beam with an isolated load at its free end and with a uniformly distributed load over its entire length, is (A) 1 (B) 24/15 (C) 3/8 (D) 8/324. The slenderness ratio of a vertical column of square cross- section of 10 cm side and 500 cm long, is (A) 117.2 (B) 17.3 (C) 173.2 (D) 137.225. A simply supported beam carries two equal concentrated loads W at distances L/3 from either support. The maximum bending moment (A) WL/3 (B) WL/4 (C) 5WL/4 (D) 3WL/12