A well is considered to be good if it is sunk into
Well treated water is generally supplied for
Alum is a
Pick up the incorrect statement from the following. In take of water supply should
The nitrate concentration in domestic water supplies, is generally limited to
Non-pathogenic bacterias cause the following water borne disease,
Normal values of overflow rate for sedimentation tanks using coagulants in litres/hr/m2 , generally range between
Reciprocating pumps
Ground water from artesian wells
Permanent hardness of water can be removed by
In an artesian acquifer, the draw downs in two observation wells at distancesm, andm were found same after one hour and x hours respectively. The value of x, is
While selecting the location of an intake for collecting surface water, the factor considered, is
Sluice valves in main water supplies
Steel pipe are
In a rapid sand filter, air binding is caused due to excessive
In a reservoir the average volume of sediment deposition is 0.million cubic per year. If the dead storage and total capacity of the reservoir are 8 million cubic metres andmillion cubic metres respectively,
The temporary hardness of water can be removed by
Property of earth to allow water to pass through it, is known as
Demand for public uses in a city, does not include water required for
Dissolved carbon dioxide, can be removed from the supply main by
Aqueducts are generally designed
The coefficient of permeability of soils, is generally expressed in
Water losses in water supply, is assumed as
If average volume of sediment deposits is one-tenth million cubic metres per year in a reservoir of total capacitymillion cubic metres, the dead storage will be filled up, in
Rapid gravity filters
The chloride content of treated water for public supplies should not exceed
Slow sand filter is used if maximum turbidity of raw water is less than
Pick up the correct statement from the following :
The pH value of water is kept slightly less than 7 so that hydrochloride ions may combine with ammonia ions to form
Please disable the adBlock and continue. Thank you.