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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.

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

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  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.

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

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  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

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  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%

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

  10. A.

    greater than

    B.

    equal to

    C.

    less than

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