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Mechanical Engineering :: Strength of Materials

  1. In a beam of uniform strength, the bending stress developed is constant and is equal to the allowable stress at every section of the beam.

  2. A.
    True
    B.
    False

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  3. The bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length is __________ at the fixed end.

  4. A.
    wl/4
    B.
    wl/2
    C.
    wl
    D.
    wl2/2

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  5. Two shafts 'A' and 'B' are made of same material. The shaft 'A' is of diameter D and shaft 'B' is of diameter D/2. The strength of shaft 'B' is __________ as that of shaft 'A'

  6. A.
    one-eighth
    B.
    one-fourth
    C.
    one-half
    D.
    four times

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  7. A body is subjected to a direct tensile stress (σ) in one plane. The shear stress is maximum at a section inclined at __________ to the normal of the section.

  8. A.
    45° and 90°
    B.
    45° and 135°
    C.
    60° and 150°
    D.
    30° and 135°

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  9. The bending moment on a section is maximum where shear force is

  10. A.
    minimum
    B.
    maximum
    C.
    changing sign
    D.
    zero

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  11. The springs in cars are used to store strain energy.

  12. A.
    Correct
    B.
    Incorrect

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  13. In a stress-strain diagram for mild steel, as shown in the below figure, the point A represents

  14. A.
    elastic limit
    B.
    upper yield-point
    C.
    lower yield point
    D.
    breaking point

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  15. When the retained material is subjected to some superimposed or surcharged load, the total horizontal pressure due to surcharged load is (where p = Intensity of the supercharged load)

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  17. The unit of Young's modulus is same as that of stress.

  18. A.
    True
    B.
    False

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  19. In the below figure, the point B represents upper yield point.

  20. A.
    Correct
    B.
    Incorrect

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