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Mechanical Engineering :: Strength of Materials

  1. 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 normal stress will be

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

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  3. A simply supported beam 'A' of length l, breadth b, and depth d carries a central point load W. Another beam 'B' has the same length and depth but its breadth is doubled. The deflection of beam 'B' will be __________ as compared to beam 'A'.

  4. A.
    one-fourth
    B.
    one-half
    C.
    double
    D.
    four times

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  5. The moment of resistance of a balanced reinforced concrete beam is based on the stresses in

  6. A.
    steel only
    B.
    concrete only
    C.
    steel and concrete both
    D.
    none of these

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  7. The load at which the column just buckles, is known as

  8. A.
    buckling load
    B.
    critical load
    C.
    crippling load
    D.
    any one of these

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  9. The Rankine's constant for a mild steel column with both ends hinged is

  10. A.
    1/750
    B.
    1/1600
    C.
    1/7500
    D.
    1/9000

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

  12. A.
    same
    B.
    one-half
    C.
    one-fourth
    D.
    one-eighth

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  13. A simply supported beam with a gradually varying load from zero at B and w per unit length at A is shown in the below figure. The shear force at B is equal to

  14. A.
    wl/6
    B.
    wl/3
    C.
    wl
    D.
    2 wl/3

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  15. A tensile test is performed on a round bar. After fracture, it has been found that the diameter remains approximately same at fracture. The material under test was

  16. A.
    mild steel
    B.
    cast iron
    C.
    glass
    D.
    copper

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  17. In a simply supported beam carrying a uniformly distributed load w per unit length, the point of contraflexure

  18. A.
    lies in the centre of the beam
    B.
    lies at the ends of the beam
    C.
    depends upon the length of beam
    D.
    does not exist

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  19. Modulus of rigidity may be defined as the ratio of

  20. A.
    linear stress to lateral strain
    B.
    lateral strain to linear strain
    C.
    linear stress to linear strain
    D.
    shear stress to shear strain

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