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Railways NTPC (Technical Ability) Tool Engineering Question Bank Tool Engineering

  • question_answer
    In manual programming and tape preparation for an NC drilling machine, the spindle speed was coded as S 684 (using the magic-three code). The spindle speed in rpm will be:

    A) 684                              

    B) 68.4

    C) 840                              

    D) 6840

    Correct Answer: A

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