The settling velocity of a particle in a sedimentation tank increases if______________?

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Residual chlorine in water is determined by________________?

A. starch iodide method B. orthotolidine method C. both (A) and (B) D. none of the above...

The method of analysis of distribution system in which the domestic supply is neglected and fire demand is considered is________________?

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For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as___________________?

A. 4.5 to 6.0 B. 6.5 to 8.0 C. 8.5 to 10.0 D. 10.5 to 12.0...

Sewage treatment units are designed for_______________?

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Disinfection of water results in______________?

A. removal of turbidity B. removal of hardness C. killing of disease bacteria D. complete sterilisation...