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Mechanical Engineering :: Machine Design

  1. According to maximum normal stress theory, the maximum normal stress in the shaft is

  2. A.

    \(\frac { 1 } { 2 } \sqrt{\sigma^2 + 4 t^2}\)

    B.

    \(\sqrt{\sigma^2 + 4 t^2}\)

    C.

    \(\frac { 1 } { 2 }[\sigma + \sqrt{\sigma^2 + 4 t^2}]\)

    D.

    \(\sigma + \sqrt{\sigma^2 + 4 t^2}\)


  3. When a beam of rectangular cross-section of width b and depth d, is subjected to a shear force F, the maximum shear stress induced will be

  4. A.

    \(\frac { F } { bh }\)

    B.

    \(\frac { 3F } { bh }\)

    C.

    \(\frac { 2 F } { bh }\)

    D.

    \(\frac { 4 F } { bh }\)


  5. In designing a connecting rod, it is considered like __________ for buckling about Y-axis.

  6. A.

    both ends hinged

    B.

    both ends fixed

    C.

    one end fixed and the other end hinged

    D.

    one end fixed and the other end free


  7. According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be

  8. A.

    45 to 60%

    B.

    63 to 70%

    C.

    70 to 83%

    D.

    80 to 90%


  9. A steel containing __________ 0.8% carbon is known as hypo-eutectoid steel.

  10. A.

    greater than

    B.

    equal to

    C.

    less than