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Dhaka WASA Supply & Sewerage Authority (DWASA) || Assistant Engineer (02-03-2024) || 2024

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টেকনিক্যাল

specific gravity = gravity x density
dynamicviscosity = kinematicviscosity x density
gravity = specific gravity x density
kinematicviscosity = dynamicviscosity x density
Using lime soda process
Excess lime treatment
lon exchange method
Using excess alum dosage
Aerobic attached growth system
Anaerobic attached growth system
Anaerobic suspended growth system
Aerobic suspended system
contains pathogenic bacteria
Consists of undesirable substances making it unfit for its best use i.e. drinking
is safe and suitable for drinking and domestic use
is contaminated
increase in viscosity of gas
increase in viscosity of liquid
decrease in viscosity of gas
decrease in viscosity of liquid
gravitational pull exerted by the earth
forces experienced by body in atmosphere
force of attraction experienced by particles
gravitational force of attraction towards the center of the earth.
body centred cubic
face centred cubic
hexagonal close packed
cubic structure