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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


  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


  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


  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


  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