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Mechanical Engineering :: Machine Design

  1. The bending moment M and a torque T is applied on a solid circular shaft. If the maximum bending stress equals to maximum shear stress developed, then M is equal to

  2. A.

    T/2

    B.

    T

    C.

    T

    D.

    T


  3. For longitudinal joint in boilers, the type of joint used is

  4. A.

    For longitudinal joint in boilers, the type of joint used is

    B.

    butt joint with double cover plate

    C.

    lap joint with one ring overlapping the other

    D.

    any one of the above


  5. A cotter joint is used to transmit

  6. A.

    axial tensile load only

    B.

    axial compressive load only

    C.

    combined axial and twisting loads

    D.

    axial tensile or compressive loads


  7. The maximum efficiency of a square threaded screw is

  8. A.

    \(\frac { 1 - sin \varphi } { 1 + sin \varphi }\)

    B.

    \(\frac { 1 + sin \varphi }{ 1 - sin \varphi } \)

    C.

    \(\frac { 1 - sin \varphi }{ 1 + cos \varphi }\)

    D.

    \(\frac { 1 + cos \varphi }{ 1 - sin \varphi }\)


  9. The dynamic tooth load is due to

  10. A.

    inaccuracies of tooth spacing

    B.

    irregularities in tooth profiles

    C.

    deflections of teeth under load

    D.

    all of these