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Explain the Ion Exchange water Softening
Softening is usually done using a resin (natural or synthetic long chain chemical with a sodium ion attached). When water containing hardness ions is passed through the resin, the hardness ions (Ca, Mg) exchange with Na ions on the resin (thus the resulting water is free of hardness ions but high in sodium).
When the sodium ions on the resin are exhausted, the resin is regenerated using a brine solution (which replaces all hardness ions attached to the resin with Na ions again) and the resin can be used again.
Tests on Limestones Practical tests are made on lime stones to decide their suitability is following: i. Physical tests ii. Heat test iii.
Explain the term - Non-bonded Prestressed Concrete It is a method of construction in which the tendons are not bonded to the concrete. Ducts, housing the tendons, are not grout
Why we mixm pozzolona in cement
Calculate the Benefit-Cost Ratio for Municipal Government Project With interest at 10%, the benefit-cost ratio for this municipal government project is most nearly: Initia
Pavement of evaluation
The specific gravity of ferric chloride solution equals 1.3. How much does one gallon of ferric chloride weigh? Solution: ρ ferric chloride /ρ water = 1.3 Conver
grading surface area of Aggregate
In order to determine the water content of a wet sand, a sample weighing 4 N was put in a pyknometer. Water was then poured to fill it and the weight of the pyknometer and its con
The stresses acting on the plane of maximum shearing stress by a given point in sand are as follows: total normal stress = 250 kN/m 2 ; pore-water pressure = 88.5 kN/ m 2 ; shearin
what is the classification of lintel
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