Related Questions

The most widely used coagulant for removing suspended impurities from water is
A Bleaching powder
B Chlorine
C Calcium sulphate
D Alum
Which is the most widely used coagulant for the treatment of turbid water?
A Alum (aluminium sulphate)
B Lime
C Ferric chloride
D Sodium aluminate
The most commonly used chemical coagulant in water treatment is
A Ferrous sulphate
B Alum
C Lime
D Hydrazine
Very fine suspended and colloidal impurities are removed from water by a process called
A Sedimentation
B Coagulation
C Disinfection
D Softening
The amount of chemical coagulant added for treatment of polluted water __________ with increase in temperature of the polluted water to be treated.
A Decreases
B Increases
C Remains constant
D May increase or decrease ; depends on the chemical characteristics of polluted water
Alum as a coagulant is found to be most effective when pH range of water is
A 2 to 4
B 4 to 6
C 6 to 8
D 8 to 10
Which is the most practical and economical method for removal of suspended solid matter from polluted water?
A Sedimentation
B Skimming off
C Chlorination
D Biological oxidation
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
Which of the following is used as a coagulant in water treatment?
A Chloramine
B Chlorine
C Ferrous sulphate
D Hydrogen peroxide
Which of the following is used as a coagulant in treating turbid water?
A Chlorine
B Ferric sulphate
C Calcium sulphate
D Activated carbon

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