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Mechanical Engineering :: Strength of Materials

  1. When a body is subjected to a direct tensile stress (σ) in one plane, then normal stress on an oblique section of the body inclined at an angle θ to the normal of the section is

  2. A.
    σ cos θ
    B.
    σ cos2 θ
    C.
    σ sin θ
    D.
    σ sin2 θ

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  3. The columns whose slenderness ratio is less than 80, are known as

  4. A.
    short columns
    B.
    long columns
    C.
    weak columns
    D.
    medium columns

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  5. The equivalent length, of a given column with given end conditions, is the length of an equivalent column of the same material and cross-section with hinged ends, and having the value of crippling load equal to that of the given column.

  6. A.
    True
    B.
    False

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  7. Within elastic limit, shear stress is __________ shear strain.

  8. A.
    equal to
    B.
    less than
    C.
    directly proportional to
    D.
    inversely proportional to

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  9. Modular ratio of the two materials is the ratio of

  10. A.
    linear stress to linear strain
    B.
    shear stress to shear strain
    C.
    their modulus of elasticities
    D.
    their modulus of rigidities

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  11. The hoop stress in a thick cylindrical shell is maximum at the inner radius.

  12. A.
    True
    B.
    False

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  13. The bending moment at the free end of a cantilever beam is

  14. A.
    zero
    B.
    minimum
    C.
    maximum

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  15. If there is a fall in the temperature of a composite body, then a member having greater coefficient of linear expansion will be subjected to compressive stress.

  16. A.
    True
    B.
    False

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  17. The lower layer of the beam as shown in the below figure, will be

  18. A.
    in tension
    B.
    in compression
    C.
    neither in tension nor in compression

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