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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.
Softening Point Test: The temperature at which bitumen softens is determined by the "Ring and Ball" test (Figure). (a) Diagram of Apparatus at Beginning of Test (b
define dence bituminous course..
Q. Grouting in segmental linings in tunnels? Grouting is typically carried out under pressure in segmental linings at the time of tunnel construction due to the below reasons:
Q. Permanent Repairs to rail fracture? (i) If the fracture is such that, wide gap A T welding ban be adopted, then the total length of fractured ends to-be cut shall be equal t
can we provide base isolation for high rise buildings ? Can we provide it for diagrid structures? if; yes Up to which no of storeys
The Figure 1 below shows a section through a stairway for a garage in a new proposed dwelling. The stairway is 3 meters wide with 300 mm wide treads(7 treads) and 170 mm high riser
Define the Precedence Diagramming Methods a) Activity on Node (AON) with arrows for dependencies b) Uses all forms of precedence relationships
Resultant Force on a Given Area of an Inclined Plane The resultant force is calculated from the average pressure: R = (AVERAGE P)(A)
Define Problems in turbid water - underwater inspection of bridge? There are three main problems, which limit the viewing performance of an underwater camera. These are: -
State the term- friction in tendon Considerable frictional loss takes place due to friction between the tendon and the material surrounding it, namely the concrete or the sheat
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