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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
Bonding performance to concrete: Epoxy-coated bars vs. galvanized bars Based on the findings of CEB Bulletin 211 the bonding of galvanized bars to concrete is lower in early
1. Determine a network diagram method that uses only finish-to-start relationships and may use dummy activities to define logical relationships. 2. Precedence diagr
Project specifications require a relative compaction of 95% (modified Proctor). Construction of a highway embankment requires 10,000-yd 3 of fill. The borrow soil has an in-situ
The atmospheric pressure is given 680 mm Hg at a certain mountain location of elevation 2000 m. air density is 1.007 kg/m3. Find the pressure in kPa.
Question What is key disparity between working stress approach and limit state approach ? Answer Working stress approach, service loads are used in whole plan and st
How to use plaster cement in sand? Cement sand plaster is a layer of cement & sand mortar that is applied over walls made of brickwork, cement block work, RCC walls and RCC co
Describe the process of yielding and state the effect work hardening has on the yield point of mild steel using suitable sketches where appropriate.
Question Soil nails are mostly designed for stabilization of key slips . How can designer cater for stability of minor slips? Answer There are many methods to treat mi
meaning of scale factor
State the effect of friction for a straight tendon The length effect represents the effect of friction for a straight tendon due to slight imperfections of the duct. In practic
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