Top 150+ Solved Water Supply Engineering MCQ Questions Answer
Q. Which of the following process is used to remove the colloidal particles from water?
a. chemical precipitation
b. chemical coagulation
c. ion exchange
d. adsorption
Q. Flocculation of iron from water by the addition of lime is an example of which of the following process?
a. chemical precipitation
b. chemical coagulation
c. ion exchange
d. adsorption
Q. In which unit operation objectionable solutes are converted into unobjectionable forms without removal?
a. gas transfer
b. ion transfer
c. solute stabilization
d. solids transfer
Q. In which form of solute stabilization, hydrogen sulfide in water is oxidized into sulfate?
a. chlorination
b. liming
c. re-carbonation
d. super-chlorination
Q. Which form of solute stabilization occurs when water passes through limestone?
a. chlorination
b. liming
c. re-carbonation
d. super-chlorination
Q. In which process, excess lime is converted into bicarbonate?
a. chlorination
b. liming
c. re-carbonation
d. super-chlorination
Q. By which process, odour producing substances is oxidized?
a. chlorination
b. liming
c. re-carbonation
d. super-chlorination
Q. Solids are removed from the water by which of the following unit operation?
a. inter facial contact
b. solid stabilization
c. ion transfer
d. solids transfer
Q. Organic contaminants are removed from the water by the process of
a. water softening
b. demineralization
c. absorption
d. adsorption
Q. is an operation designed to force agitation in the fluid and induce coagulation.
a. sedimentation
b. flocculation
c. disinfection
d. aeration
Q. What is the normal value of the detention period adopted in a flocculator for design purpose?
a. 30min
b. 60min
c. 90min
d. 100min
Q. The design value of the velocity of flow in a flocculator is
a. 0.2-0.8m/s
b. 0.3-0.5m/s
c. 0.6-0.8m/s
d. 0.1-0.5m/s
Q. What is the detention period of a clarifier used in the treatment of water?
a. 1hour
b. 2hours
c. 3hours
d. 4hours