Strength of Materials Mock test – 6 || Civil Engineering Mock tests Welcome to your Strength of Materilas Mock test - 6 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. Along the principal plan subjected to maximum principal stress (A) Maximum shear stress acts (B) Minimum shear stress acts (C) No shear stress acts (D) None of these2. In a shaft rotated by a couple, the shear force varies (A) From zero at the centre to a maximum at the circumference (B) From minimum at the centre of maximum at the circumference (C) From maximum at the centre to zero at the circumference (D) Equally throughout the section3. The width of a beam of uniform strength having a constant depth d length L, simply supported at the ends with a central load W is (A) 2WL/3fd² (B) 3WL/2fd² (C) 2fL/3Wd4 (D) 3fL²/2Wd4. 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 (A) Determinate (B) Statically determinate (C) Statically indeterminate (D) None of these5. 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 times6. A member which does not regain its original shape after removed of load producing deformation is said (A) Plastic (B) Elastic (C) Rigid (D) None of these7. The region of the cross-section of a column in which compressive load may be applied without producing any tensile stress, is known as the core of the cross-section. In circular columns the radius of the core, is (A) One-half of the radius (B) One-third of the radius (C) One-quarter of the radius (D) One-fifth of the radius8. The cross sections of the beams of equal length are a circle and a square whose permissible bending stress is same under same maximum bending. The ratio of their flexural weights is, (A) 1.118 (B) 1.338 (C) 1.228 (D) 1.1089. If b is the width of a plate joined by diamond riveting of diameter d, the efficiency of the joint is given by (A) (b + d)/b (B) (b - d)/b (C) (d - b)/d (D) (b - d)/d10. A solid cube is subjected to equal normal forces on all its faces. The volumetric strain will be x- times the linear strain in any of the three axes when (A) x = 1 (B) x = 2 (C) x = 3 (D) x = 411. For a given material Young's modulus is 200 GN/m2 and modulus of rigidity is 80 GN/m2. The value of Poisson's ratio is (A) 0.15 (B) 0.20 (C) 0.25 (D) 0.3012. 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) 1/2 (B) 1/8 (C) 2 (D) 813. A cantilever carrying a uniformly distributed load W over its full length is propped at its free end such that it is at the level of the fixed end. The bending moment will be zero at its free end also at (A) Midpoint of the cantilever (B) Fixed point of the cantilever (C) 1/4th length from free end (D) 3/4th length from free end14. A projectile is fired at an angle to the vertical. Its horizontal range will be maximum when is (A) 0° (B) 30° (C) 45° (D) 60°15. If a shaft is simultaneously subjected to a toque T and a bending moment M, the ratio of maximum bending stress and maximum shearing stress is (A) M/T (B) T/M (C) 2M/T (D) 2T/M16. A uniform girder simply supported at its ends is subjected to a uniformly distributed load over its entire length and is propped at the centre so as to neutralise the deflection. The net B.M. at the centre will be (A) WL (B) WL/8 (C) WL/24 (D) WL/3217. In a tension test, the yield stress is 300 kg/cm2, in the octahedral shear stress at the point is: (A) 100 kg/cm2 (B) 150 kg/cm2 (C) 200 kg/cm (D) 250 kg/cm218. 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-section19. The length of a column, having a uniform circular cross-section of 7.5 cm diameter and whose ends are hinged, is 5 m. If the value of E for the material is 2100 tonnes/cm2, the permissible maximum crippling load will be (A) 1.288 tonnes (B) 12.88 tonnes (C) 128.8 tonnes (D) 288.0 tonnes 20. When a rectangular beam is loaded longitudinally, shear develops on (A) Bottom fibre (B) Top fibre (C) Middle fibre (D) Every-horizontal plane21. A three hinged arch is loaded with an isolated load 1000 kg at a horizontal distance of 2.5 m from the crown, 1 m above the level of hinges at the supports 10 metres apart. The horizontal thrust is (A) 1250 kg (B) 125 kg (C) 750 kg (D) 2500 kg22. 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 stress23. 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 (A) Triangle (B) Rectangle (C) Parabola (D) Cubic parabola24. A rectangular beam 20 cm wide is subjected to a maximum shearing force of 10,000 kg, the corresponding maximum shearing stress being 30 kg/cm2. The depth of the beam is (A) 15 cm (B) 20 cm (C) 25 cm (D) 30 cm25. For a simply supported beam carrying uniformly distributed load W on it entire length L, the maximum bending moment is (A) WL/4 (B) WL/8 (C) WL/2 (D) WL/3