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Railways NTPC (Technical Ability) Materials Science Question Bank Materials Science

  • question_answer
    Which of the following display properties similar to that of steel?
    1. Black-heart cast iron   
    2. White-heart cast iron
    3. Gray cast iron            
    4. Pig iron                                      

    A) 1 and 2 only                 

    B) 3 and 4 only

    C) 2 and 4 only                 

    D) 1 and 3 only

    Correct Answer: A

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