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Railways NTPC (Technical Ability) Theory of Machines and Machine Design Question Bank Theory of Machines and Machine Design

  • question_answer
    Kinematic pairs are those which have

    A)  point or line contact between the two elements when in motion

    B)  surface contact between the two elements when in motion

    C)  elements of pairs not held together mechanically

    D)  two elements that permit relative motion

    Correct Answer: D

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