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Railways NTPC (Technical Ability) Metal Forming, Casting and Cutting Question Bank Metal Cutting

  • question_answer
    Consider the following tool materials:
    1. Carbide                     
    2. Cermet
    3. Ceramic                    
    4. Borazon
    The correct sequence of these tool materials in increasing order of the their ability to retain their hot hardness is:

    A) 1, 2, 3, 4                      

    B) 1, 2, 4, 3

    C) 2, 1, 3, 4                      

    D) 2, 1, 4, 3

    Correct Answer: A

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