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Mechanical Engineering :: Machine Design

  1. Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be

  2. A.

    2

    B.

    4

    C.

    8

    D.

    16


  3. Wahl's stress factor __________ very rapidly as the spring index decreases.

  4. A.

    increases

    B.

    decreases


  5. Wahl's stress factor __________ very rapidly as the spring index decreases.

  6. A.

    increases

    B.

    decreases


  7. For circumferential joint in boilers, the type of joint used is

  8. A.

    butt joint with single cover plate

    B.

    butt joint with single cover plate

    C.

    lap joint with one ring overlapping the other

    D.

    any one of the above


  9. In cyclic loading, stress concentration is more serious in

  10. A.

    brittle materials

    B.

    ductile materials

    C.

    brittle as well as ductile materials

    D.

    elastic materials