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Mechanical Engineering :: Strength of Materials

  1. A column that fails due to direct stress, is called

  2. A.
    short column
    B.
    long column
    C.
    weak column
    D.
    medium column

  3. The thermal stress __________ upon the cross-sectional area of the bar.

  4. A.
    depends
    B.
    does not depend

  5. A thin cylindrical shell of diameter (d) length (l) and thickness (t) is subjected to an internal pressure (p). The longitudinal stress in the shell is

  6. A.
    pd/t
    B.
    pd/2t
    C.
    pd/4t
    D.
    pd/6t

  7. If the section modulus of a beam is increased, the bending stress in the beam will

  8. A.
    not change
    B.
    increase
    C.
    decrease

  9. A beam encastered at both the ends is called

  10. A.
    simply supported beam
    B.
    fixed beam
    C.
    cantilever beam
    D.
    continuous beam

  11. The bending moment diagram for a simply supported beam carrying a uniformly distributed load of w per unit length, will be

  12. A.
    a horizontal line
    B.
    a vertical line
    C.
    an inclined line
    D.
    a parabolic curve

  13. The bending moment at the centre of a simply supported beam with a gradually varying load from zero at both ends to w per metre at the centre is wl/4.

  14. A.
    Yes
    B.
    No

  15. A body is subjected to a direct tensile stress of 300 MPa in one plane accompanied by a simple shear stress of 200 MPa. The maximum shear stress will be

  16. A.
    -100 MPa
    B.
    250 MPa
    C.
    300 MPa
    D.
    400 MPa

  17. In a thick cylindrical shell subjected to an internal pressure (p), the tangential stress is always a tensile stress where as the radial stress is a compressive stress

  18. A.
    Correct
    B.
    Incorrect

  19. The horizontal thrust offered by the retaining wall on the retained material is (where w = Specific weight of the retained material, h = height of retaining wall, and (φ) = Angle of repose of the retained earth)