A. Coagulation
B. Sedimentation
C. Softening
D. Disinfection
Related Mcqs:
- Removal of dirt/soil by soaps or detergent does not involve the _______________ of soil ?
A. Emulsification
B. Dispersion
C. Precipitation
D. Wetting - The main use of activated carbon in water treatment is to control ___________________?
A. Bacterial growth
B. Taste and odour
C. Turbidity
D. None of these - Hydrazine is used in water treatment for the removal of___________________?
A. Colloidal impurities
B. Dissolved oxygen
C. Turbidity
D. Chlorinous taste - Pick out the false statement pertaining to water treatment ?
A. Aeration of water is effective in CO2 removal
B. The zeolite water softening process reduces the hardness of water by not more than 50%
C. Sodium sulphate or sodium carbonate do not cause hardness in water
D. Water with pH value less than 7, is acidic - Chloramines are used in water treatment for_____________________?
A. Disinfection and control of taste & odour
B. Corrosion control
C. Removing turbidity
D. Control of bacteria - Pick out the true statement pertaining to water treatment ?
A. Slow sand filters can remove colour completely
B. Activated carbon can be used for taste & odour control without subsequent filtration
C. Application of activated carbon reduces the temporary hardness of water
D. Normally, the turbidity is removed by adding a coagulant prior to sedimentation - Alum [Al2(SO4)3] is used as a coagulant in water treatment to remove____________________?
A. Colour
B. Turbidity
C. Bacteria
D. All A , B. and C. - Calgon used in water treatment is chemically ____________________?
A. Sodium phosphate
B. Sodium hexametaphosphate
C. Calcium phosphate
D. Tricresyl phosphate - Which of the following is used as a coagulant in water treatment ?
A. Chloramine
B. Chlorine
C. Ferrous sulphate
D. Hydrogen peroxide - Deaeration of water in its treatment is necessary, as it___________________?
A. Minimises its turbidity
B. Helps in controlling its taste and odour
C. Minimises its corrosiveness
D. None of these
