When in the pervious strata, the surface of water surrounding the well is at atmospheric pressure, the well is known as

Related MCQs

• When a pervious strata is sandwitched between two impervious strata of cup shape, the well is called a tube well.
• Water is forced at a preseure higher than the atmospheric pressure in rapid gravity filters.
• The leakage of sewage from the sewer into the soil surrounding the water is called ex-filtration.
• The water obtained from a lake is known as surface water.
• The natural outflow of sub-surface water at the surface is termed as spring.
• The sanitation system in which a small portion of storm water is allowed to enter in the sanitary sewage sewers and the remaining storm water flows in separate set of sewers, is known as
• A sewer which receives storm water, surface run-off and sewage is called a
• Pressure filters are not used for treating municipal water supplies, because
• In presure filters, water is forced at a pressure
• The quality of tube well water is