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

  • question_answer
    In tape preparation for an NC machine tool the code S 624 would represent spindle speeds of:

    A) 624 rpm, 240 rpm and 246 rpm

    B) 624 rpm and 240 rpm                   

    C) 624 rpm and 246 rpm

    D) 240 rpm and 246 rpm

    Correct Answer: D

    Solution :

    The spindle speed function is programmed in rpm and should be expressed by a 3 digit coded number. Thus 6 represents three digits in rpm and these should start with 24. Thus, it could be 240 and 246.


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