Deaeration of water in its treatment is necessary, as it___________________?

Related Mcqs:

1. Dechlorination of treated water is necessary to __________________?

   A. Remove residual turbidity
   B. Reduce the bacterial load on filter
   C. Control taste and odour
   D. Remove chlorinous taste

2. 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

3. Hydrazine is used in water treatment for the removal of___________________?

   A. Colloidal impurities
   B. Dissolved oxygen
   C. Turbidity
   D. Chlorinous taste

4. 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

5. Chloramines are used in water treatment for_____________________?

   A. Disinfection and control of taste & odour
   B. Corrosion control
   C. Removing turbidity
   D. Control of bacteria

6. 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

7. 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.

8. Calgon used in water treatment is chemically ____________________?

   A. Sodium phosphate
   B. Sodium hexametaphosphate
   C. Calcium phosphate
   D. Tricresyl phosphate

9. Which of the following is used as a coagulant in water treatment ?

   A. Chloramine
   B. Chlorine
   C. Ferrous sulphate
   D. Hydrogen peroxide

10. Drinking (potable) water treatment does not involve __________________?

    A. Coagulation
    B. Sedimentation
    C. Softening
    D. Disinfection