The natural outflow of sub-surface water at the surface is termed as spring.

Related MCQs

• The water obtained from a lake is known as surface water.
• The artesian spring has too much hydraulic gradient and water flows out automatically.
• When chlorine is added to raw water at more than one point, the process is termed as break point chlorination.
• The water which leaks into sewers from the ground is termed as infiltration.
• The natural process in which the oxygen of water of streams is consumed by sewage and at the same time, it is replenished (filled again) by the atmosphere, is known as
• When in the pervious strata, the surface of water surrounding the well is at atmospheric pressure, the well is known as
• A sewer which receives storm water, surface run-off and sewage is called a
• An artesian spring is formed
• The most important source of water for public water supply is
• The presence of calcium and magnesium bi-carbonates in water causes hardness in the water.