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  1. If carbon monoxide is released at the rate of 0.03 m3/min from a gasolene engine and 50 ppm is the threshold limit for an 8-hour exposure, the quantity of air which dilutes the contaminant to a safe level will be

    2. A.
    60 m3/min
    B.
    600 m3/min
    C.
    600 m3/s
    D.
    60 m3/s

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    Answer : Option A

    Explanation :

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