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- The most efficient section of channel is Trapezoidal
- The specific weight of water in S.I unit is taken as 9.81kn/m3
- The mercury does not wet the glass . This is due to the property of the liquid known as cohesion
- The Atmospheric pressure at sea level is 10.3 meter of water
- The Atmospheric pressure at sea level is 10.3 meter of water
- The most efficient cross section of sewer to carry combined flow is Egged shaped
- The internal diameter of the sewer should not be less than 15 cm
- For larger sewers , The maximum distance between manholes should be 300 m
- Black cotton soil is not suitable for foundation because of its Swelling and Shrinkage
- The group index value ranges from 0 – 20
- The capillary rise of water Depends upon the force responsible
- The pressure exerted by water on the soil through when it percolates , is known as Seepage Pressure
- The direction of seepage is always perpendicular to the Equipotential lines
- The depth of water standing for crop, during the time the crop grows in the field is defined as Delta
- For Irrigation purpose , the PH value of water should be Between 6 and 8.5
- Water content of soil can be greater than 100 %
- Toughness index is defined as plasticity index to flow index
- Uniformity co efficient of soil is equal to or greater than 1
- One cubic meter of water weighs 1000 litre What is the use of orifice meter ( measure discharge
