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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
Advantages of bonded post-tensioning systems Some advantages of bonded post-tensioning systems over unbonded post-tensioning ones are the following : (a) Large reduction in
Three mechanisms: 1) Conduction - occurs in solids and stationary fluids (liquids or gases). 2) Convection - occurs in fluids. Change in the buoyancy of the fluid due to its
What is the actual mix propotion for M35/ C35 design mix concrete
convert the following whole circle bearing to QBs... WCB of AB=45 degree and 30 mintus
how does battening differ from lacing?
Define Channel Jig a) A channel jig is the simplest form of box jig. b) The work is placed in a channel shaped trough and clamped by mean of screw. c) It is utilized
derivation for traverse shear stress in beams
Q. Define Hammer efficiency and coefficient of restitution? Hammer efficiency refers to ratio of kinetic energy of hammer to the rated energy (or potential energy). Basically i
Q. Show the Functions of sleepers in railway? Functions of sleepers in railway works are as below: (i) The primary function of a sleeper is to grip the rail to gauge and t
Given for the section shown in Figure, M * = 250 kNm, f sy = 500 MPa and f c ′ = 25 MPa. Compute A st and (if necessary) A sc . You may assume that eac
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