Question

    What is the permissible concentration of residual 

    chlorine present in drinking water in mg/L?
    A 0.05 – 1 mg/L Correct Answer Incorrect Answer
    B 0.5 – 0.25 mg/L Correct Answer Incorrect Answer
    C 0.02 – 0.05 mg/L Correct Answer Incorrect Answer
    D 0.2 – 2.0 mg/L Correct Answer Incorrect Answer

    Solution

    Typical levels of free chlorine or residual chlorine  present in drinking water are 0.2 - 2.0 mg/L though  levels can be as high as 5 mg/L.

    Practice Next

    Relevant for Exams: