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 :

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