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Mechanical Engineering :: Machine Design

  1. A special case of ductility which permits materials to be rolled or hammered into thin sheets, is called

  2. A.

    plasticity

    B.

    elasticity

    C.

    ductility

    D.

    malleability

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  3. Crowning on pulley helps

  4. A.

    in decreasing the slip of the belt

    B.

    in increasing the slip of the belt

    C.

    to keep the belt in centre on a pulley while it is in motion

    D.

    to increase pulley life

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  5. The temperature required for full annealing in hyper-eutectoid steel is

  6. A.

    50°C above upper critical temperature

    B.

    50°C below upper critical temperature

    C.

    50°C above lower critical temperature

    D.

    50°C below lower critical temperature

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  7. The effect of key ways on a shaft is to reduce its load carrying capacity and to increase its torsional rigidity.

  8. A.

    True

    B.

    False

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  9. The efficiency of a riveted joint is equal to

  10. A.

    Pt/P

    B.

    Ps/P

    C.

    Pc/P

    D.

    least of PtPs and Pc/P

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