The percentage of filtered water, which is used for backwashing in rapid sand filters, is about______________?

Related Mcqs:

As compared to shallow-wells, deep wells have______________?

A. more depth B. less depth C. more discharge D. less discharge...

Average rate of water consumption perhead per day as per Indian Standard is______________?

A. 100 litres B. 135 litres C. 165 litres D. 200 litres...

The pipe which is used to carry the discharge from sanitary fittings like bath rooms, kitchens etc. is called_______________?

A. waste pipe B. soil pipe C. vent pipe D. antisiphonage pipe...

The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is____________________?

A. reflux valve B. sluice valve C. air relief valve D. pressure relief valve...

Standard EDTA (ethylene diamine tetra acetic aciD. solution is used to determine the_______________?

A. hardness in water B. turbidity in water C. dissolved oxygen in water D. residual chlorine in water...