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Mechanical Engineering :: Machine Design

  1. A shaft coupling should

  2. A.

    be easy to connect or disconnect

    B.

    transmit full power of the shaft

    C.

    hold the shafts in perfect alignment

    D.

    all of these


  3. In the levers of first type, the mechanical advantage is __________ one.

  4. A.

    less than

    B.

    equal to

    C.

    more than


  5. The load placed at the top of the screw in a mechanical screw jack is prevented from rotation by providing a swivelling mechanism.

  6. A.

    Correct

    B.

    Incorrect


  7. The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)

  8. A.

    d/8

    B.

    d/6

    C.

    d/4

    D.

    d/2


  9. The shear stress at a point in a shaft subjected to a torque is

  10. A.

    directly proportional to the polar moment of inertia and to the distance of the point from the axis

    B.

    directly proportional to the applied torque and inversely proportional to the polar moment of inertia

    C.

    directly proportional to the applied torque and the polar moment of inertia

    D.

    inversely proportional to the applied torque and the polar moment of inertia