If the average daily consumption of a city is 100,000 m3, the maximum daily con¬sumption on peak hourly demand will be_______________?

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The dissolved oxygen level in natural unpolluted waters at normal temperature is found to be of the order of________________?

A. 1 mg/litre B. 10 mg/litre C. 100 mg/litre D. 1000 mg/litre...

Chlorine demand of water is equal to________________?

A. applied chlorine B. residual chlorine C. sum of applied and residual chlorine D. difference of applied and residual chlorine...

Standard BOD is measured at________________?

A. 20°C – 1day B. 25°C- 3day C. 20°C – 5day D. 30°C- 5day...

The ratio of 5 day BOD to ultimate BOD is about_______________?

A. 1/3 B. 2/3 C. 3/4 D. 1.0...

As compared to rapid sand filters, slow sand filters give______________?

1) slower filtration rate 2) higher filtration rate 3) lesser efficiency in removal of bacteria 4) higher efficiency in removal of bacteria The correct answer is? A. (1) and (2) B. (2) and (3) C. (1) and (4) D. (2) and (4)...