# Strength of Materials Mock test – 6 || Civil Engineering Mock tests

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1. In a tension test, the yield stress is 300 kg/cm2, in the octahedral shear stress at the point is:
2. 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
3. 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
4. If b is the width of a plate joined by diamond riveting of diameter d, the efficiency of the joint is given by
5. 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,
6. As the elastic limit reaches, tensile strain
7. In a shaft rotated by a couple, the shear force varies
8. 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
9. 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
10. 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
11. When a rectangular beam is loaded transversely, the maximum compressive stress develops on
12. 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
13. For a simply supported beam carrying uniformly distributed load W on it entire length L, the  maximum bending moment is
14. A projectile is fired at an angle to the vertical. Its horizontal range will be maximum when is
15. 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
16. 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
17. When a rectangular beam is loaded longitudinally, shear develops on
18. 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
19. 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
20. 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
21. 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
22. 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
23. 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
24. A member which does not regain its original shape after removed of load producing deformation is said
25. Along the principal plan subjected to maximum principal stress

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