The least thickness of class B cast iron (spun) pipe, is_________________?
By boiling water, hardness can be removed if it is due to_________________?
Asbestos pipes are ______________?
In distribution pipes, drain valves are provided at_______________?
Biochemical Oxygen Demand (B.O.D.) of safe drinking water must be________________?
Surge tanks are used_______________?
Average annual rainfall at any station is the average of annual rainfall over a period of________________?
Disinfection of drinking water, is done to remove_________________?
The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is________________?
Time of concentration________________?
