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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.
Verify the intensity of vertical stress at a point A line load of 100 kN/metre run extends to a long distance. Verify the intensity of vertical stress at a point, 2 m below the
Explain the Equation for Length of Spiral Curve Length of Spiral Curve can be calculated using the following equation L s = 3.15V 3 /RC Where: V - Design Speed in MPH
Importance of poles in critical load combinations The poles are generally designed for the following critical load combinations : (a) Bending due to wind load on the cable
A rectangular concrete beam is subjected to a factored moment (Mu) of 345 kip*ft. The beam has the following properties: f'c = 5500 psi fy = 60,000 psi h = 39 in
Total Dynamic Head: (TDH) y-axis plot point related to each x-axis flow rate along the system curve plot. TDH = h a = TSH + h f + v 2 /2g v 2 / 2g usually small
what do you mean by buttering mixers
Question Why is slump specified in concrete carriageway comparatively low like 30mmwhen compared with normal concrete like 75mm? Answer Slump of concrete carriageway
Procedures of graphical interpolation
Categories of losses of prestress We may put various losses in either of two categories : Losses which take place during transfer of prestress and those which take place after
What is the Loss of Prestress due to Shrinkage of Concrete It is the loss of prestress due to shrinkage of concrete, which takes place in the initial stage of hardening of conc
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