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Railways RRB (Assistant Loco Pilot & Technician) Solved Paper-2 (2013)

  • question_answer
    Gypsum is added to Portland cement to

    A)  accelerate the process of setting

    B)  harden it

    C)  retard the process of setting

    D)  improve hydratability of cement

    Correct Answer: C

    Solution :

    Not available 


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