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Mechanical Engineering :: Machine Design

  1. If a bearing is designated by the number 305, it means that the bearing is of

  2. A.

    light series whose bore is 5 mm

    B.

    light series whose bore is 25 mm

    C.

    medium series whose bore is 5 mm

    D.

    medium series whose bore is 25 mm


  3. When two helical springs of equal lengths are arranged to form a cluster spring, then

  4. A.

    shear stress in each spring will be equal

    B.

    load taken by each spring will be half the total load

    C.

    all of the above

    D.

    none of these


  5. Tapered roller bearings can take

  6. A.

    radial load only

    B.

    axial load only

    C.

    both radial and axial loads and the ratio of these being less than unity

    D.

    both radial and axial loads and the ratio of these being greater than unity


  7. In order to remove internal stresses produced by hardening the steel, the process usually adopted is

  8. A.

    tempering

    B.

    annealing

    C.

    normalising

    D.

    spheroidising


  9. A pressure vessel is said to be a thin shell, if the ratio of wall thickness to its diameter is equal to 1/10.

  10. A.

    Yes

    B.

    No