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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
Univariate normal distribution: Let X = (X I , X 2 , ..., X n ,) has the multivariate normal distribution (5.26) of Section 5.4. Show that Y = a X ' follows a univariate norma
spiral curves?
What is Tendonand describe its working It is a steel element, such as a wire, cable, bar or strand which is provided, in a stretched form, to impart prestressing force in con
Q. What is Rail Lubrication? Rail Lubrication is done on sharp curves where lateral wear is considerable. The function of Rail Lubrication is to lubricate or oil the running fa
Q. Use of PFA and GGBS? Both PFA and GGBS are by-products of industry and use of them is ecologically friendly. Most significantly, with PFA and GBS adopted as partial replacem
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Q. Free- fall concrete placement in bored piles? Based on the research by STS Consultants Ltd it was found that concrete placed by free falling below 120 feet will not suffer f
Given: pretensioned rectangular beam b=6" h=20" f'c=4000psi f'ci=3000psi fti=.165ksi fts=.38ksi fci=1.8ksi fcs=1.8ksi R=0.80 Required: (a)Pi and e to maximize Md+
Retaining Walls: A wall used to retain some material on one or both sides of it can be termed as retaining wall. Commonly, it is used to retain soil at two different levels on
Explain the Installation of Shock Transmission Unit? It is not always necessary to install STUs while a structure is under construction but the holding down anchor bolts and th
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