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Mechanical Engineering :: Machine Design

  1. Antifriction bearings are

  2. A.

    thick lubricated bearings

    B.

    plastic bearings

    C.

    thin lubricated bearings

    D.

    ball and roller bearings

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  3. Stress concentration factor is defined as the ratio of

  4. A.

    maximum stress to the endurance limit

    B.

    nominal stress to the enurance limit

    C.

    maximum stress to the nominal stress

    D.

    nominal stress to the maximum stress

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  5. The property of a bearing material which has the ability to accomodate shaft deflections and bearing inaccuracies by plastic deformation without excessive wear and heating, is known as

  6. A.

    bondability

    B.

    embeddability

    C.

    comformability

    D.

    fatigue strength

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  7. In the levers of __________ type, the mechanical advantage is less than one.

  8. A.

    first

    B.

    second

    C.

    third

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  9. A hollow saddle key is

  10. A.

    a taper key which fits half in the key way of hub and half in the key way of shaft

    B.

    a taper key which fits in a key way of the hub and is flat on the shaft

    C.

    a taper key which fits in a key way of the hub and the bottom of the key is shaped to fit the curved surface of the shaft

    D.

    provided in pairs at right angles and each key is to withstand torsion in one direction only

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