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  3. Railways

Railways Sample Paper RRB (Group D) Sample Test Paper-6

  • question_answer
    The presence of which of the following salts in water causes corrosion in steam boilers?

    A)  Sodium Chloride

    B)  Magnesium Chloride

    C)  Calcium bicarbonate

    D)  Potassium bicarbonate

    Correct Answer: B

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