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Mechanical Engineering :: Strength of Materials

  1. A uniformly distributed load may be assumed to behave like a point load at the centre of gravity of the load for all sorts of calculations.

  2. A.
    Correct
    B.
    Incorrect

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  3. The shear force in the centre of a simply supported beam carrying a uniformly distributed load of w per unit length, is

  4. A.
    zero
    B.
    wl2/2
    C.
    wl2/4
    D.
    wl2/8

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  5. When a change in length takes place, the strain is known as

  6. A.
    linear strain
    B.
    lateral strain
    C.
    volumetric strain
    D.
    shear strain

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  7. The maximum bending moment of a simply supported beam with central point load lies at the point of loading.

  8. A.
    True
    B.
    False

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  9. When the shear force diagram between any two points is an inclined straight line, it indicates that there is a uniformly varying load between the two points.

  10. A.
    Yes
    B.
    No

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  11. The maximum deflection of a fixed beam of length l carrying a total load W uniformly distributed over the whole length is

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  13. The pull required to tear off the plate per pitch length is (where p = Pitch of rivets, t = Thickness of plates, and σt, τ and σc = Permissible tensile, shearing and crushing stresses respectively)

  14. A.
    (p - 2d)t x σc
    B.
    (p - d)t x τ
    C.
    (p - d)t x σt
    D.
    (2p - d)t x σt

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  15. When a beam is subjected to bending moment, the stress at any point is __________ the distance of the point from the neutral axis.

  16. A.
    equal to
    B.
    directly proportional to
    C.
    inversely proportional to
    D.
    independent of

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  17. The torsional rigidity of a shaft is given by

  18. A.
    T/J
    B.
    T
    C.
    T/r
    D.
    T/G

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  19. The unit of strain is

  20. A.
    N-mm
    B.
    N/mm
    C.
    mm
    D.
    no unit

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