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Explain Hardness - Water Softening
1) Hardness is used to characterize a water that does not lather well, causes a scum in the bath tub and leaves hard, white, crusty deposits when water is heated
2) Calcium or magnesium forms soap- Ca or Mg complex and prevents soap from interacting with dirt
3) Hardness- caused mainly by Calcium and Magnesium(actually all polyvalent ions)
4) Common units are meq/l or mg/l as CaCO3
Define Major Ions present in the water Cations: Calcium, Magnesium, sodium, potassium Anions: Bicorabonate, sulfate, chloride Other ions present: Iron. Manganese, Fluor
differences between highway pavement and airfield pavement
Cargo Handling Facilities: All water transport terminals require cargo handling facilities. Cranes of various sizes are used. In docks, traveling cranes are popular (Figure).
Calculate the Horizontal Distance A surveyor's total station measured slope distance near station 3245+26.35 is recorded as 437.380-m with a zenith angle of 118º 48' 07" and a
Q. Utilisation of Buoyancy Effect? Submerged part of the substructure will be subjected to buoyancy effect. The uplift pressure from the ground water can be utilised by constru
Explain the Perception Reaction Time A significant variable in the successful processing and use of information is the speed with which this is done. Perception-Reaction Time (
"We have one other pressing challenge that you could review for us," Alistair Wu says. "As you know, the Shanghai plant was our first facility in China, but we also have two other
gabbion retaining wall design
Cumulative distribution function - Poisson distribution: Find the cdf of Y = X 1 , + X 2 where X I and X 2 independently follow Poisson distribution with parameters λ l an
Air Traffic Control: Importance of Air Traffic Control Air Traffic Control is a system by which routes for flying aircraft are defined, flight rules are framed, and f
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