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Disinfection on Environmental Studies related Questions and Answers


Question :   The water is free from oxidizable materials. What is the dosage of ozone required?
1. 0.01ppm
2. 0.1-0.2ppm
3. 0.2-0.3ppm
4. 0.4-0.5ppm
Answer :   3 - 0.2-0.3ppm  

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