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Mechanical Engineering :: Strength of Materials

  1. The rivets are made from ductile material.

  2. A.
    Yes
    B.
    No

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  3. The rectangular beam 'A' has length l, width b and depth d. Another beam 'B' has the same length and width but depth is double that of 'A'. The elastic strength of beam B will be __________ as compared to beam A.

  4. A.
    same
    B.
    double
    C.
    four times
    D.
    six times

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  5. When a closely-coiled helical spring is subjected to an axial load, it is said to be under

  6. A.
    bending
    B.
    shear
    C.
    torsion
    D.
    crushing

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  7. When a rectangular beam is loaded transversely, the zero stress is developed on the neutral axis.

  8. A.
    True
    B.
    False

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  9. The given figure shows the Mohr's circle of stress for two unequal and like principal stresses (σx and σy) acting at a body across two mutually perpendicular planes. The normal stress on an oblique section making an angle θ with the minor principle plane is given by

  10. A.
    OC
    B.
    OP
    C.
    OQ
    D.
    PQ

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  11. According to Euler's column theory, the crippling load for a column of length (l) with one end fixed and the other end free is __________ the crippling load for a similar column hinged at both the ends.

  12. A.
    equal to
    B.
    less than
    C.
    more than

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  13. If percentage reduction in area of a certain specimen made of material 'A' under tensile test is 60% and the percentage reduction in area of a specimen with same dimensions made of material 'B' is 40%, then

  14. A.
    the material A is more ductile than material B
    B.
    the material B is more ductile than material A
    C.
    the ductility of material A and B is equal
    D.
    the material A is brittle and material B is ductile

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  15. The shear force diagram for a simply supported beam carrying a uniformly distributed load of w per unit length, consists of

  16. A.
    one right angled triangle
    B.
    two right angled triangles
    C.
    one equilateral triangle
    D.
    two equilateral triangles

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  17. A body is subjected to two normal stresses 20 kN/m2 (tensile) and 10 kN/m2 (compressive) acting perpendicular to each other. The maximum shear stress is

  18. A.
    5 kN/m2
    B.
    10 kN/m2
    C.
    15 kN/m2
    D.
    20 kN/m2

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  19. When a cantilever beam is loaded at its free end, the maximum compressive stress shall develop at

  20. A.
    bottom fibre
    B.
    top fibre
    C.
    neutral axis
    D.
    centre of gravity

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