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

  • question_answer
    In finish machining of an island on a casting with CNC milling machine, an end mill with 10 mm diameter is employed. The comer points of the island arc represented by (0, 0), (0, 30), (50, 30) and (50, 0). by applying cutter radius right compensation, the trajectory of the cutter will be:

    A) \[(-5,\,0),\]\[(-\,5,\,35),\]\[(55,\,35),\]\[(55,\,-5),\]\[(-5,\,-5)\]

    B) \[(0,-\,5),\]\[(55,\,-5),\]\[(55,\,35),\]\[(-\,5,\,35),\]\[(-5,\,-5)\]

    C) \[(5,\,5),\]\[(5,\,25),\]\[(45,25),\]\[(45,5),\]\[(5,\,5)\]

    D) \[(5,\,5),\]\[(45,\,5),\,\]\[(45,\,25),\] \[(5,\,25),\]\[(5,\,5)\]

    Correct Answer: B


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