Related Questions

Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream?
A Sedimentation tank
B Circular clarifier
C Mechanical flocculation
D Chemical coagulation
Most widely and commonly used coagulant for the removal of suspended impurities in water is
A Bleaching powder
B Slaked lime
C Alum
D Copper sulphate
The most widely used coagulant for removing suspended impurities from water is
A Bleaching powder
B Chlorine
C Calcium sulphate
D Alum
In large thermal power stations very fine particulates present in flue gas are removed by
A Wet scrubber
B Bag filter
C Electrostatic precipitators
D Dust catcher
When the body is suspended at the point of suspension, its periodic time and frequency will be ________ as compared to the body suspended at the point of percussion.
A Same
B Two times
C Four times
D None of these
Impurities present in brine is normally removed by treatment with
A NH3 and CO2
B Lime and soda ash
C Lime, ammonia and carbon
D All of the above
Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by
A Chemical coagulation
B Floatation & skimming
C Centrifugation
D Ultrafiltration
Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by
A Biological oxygen pond
B Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)
C Lagoons
D Filtration
A substance which readily forms colloidal solution in contact with water is called
A Extrinsic colloid
B Associated colloid
C Hydrophobic colloid
D Hydrophilic colloid
The process by which fine solids is removed from liquids is termed as
A Decantation
B Flocculation
C Sedimentation
D Classification

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