Q. Why Alum is preferred over other coagulants?

View solution

Q. The chemical composition of Chlorinated Copperas is __________

View solution

Q. Ferric chloride is effective over a pH range of __________

View solution

Q. Why Magnesium carbonate is not commonly preferred as coagulant?

View solution

Q. Which of the following statement is wrong regarding Iron salt?

View solution

Q. __________ is an operation designed to force agitation in the fluid and induce coagulation.

View solution

Q. The rate of change of velocity per unit distance normal to a section is called_______

View solution

Q. What is the dimension formula of mean velocity gradient?

View solution

Q. What is the desirable value of mean velocity gradient in a flocculator?

View solution

Q. What is the normal value of the detention period adopted in a flocculator for design purpose?

View solution

Q. The design value of the velocity of flow in a flocculator is _______

View solution

Q. What is the detention period of a clarifier used in the treatment of water?

View solution

Q. The pulsator clarifier is a type of __________

View solution

Q. Which device solved the problem of unstable hydraulic conditions and operation of sludge removal equipment?

View solution

Q. In which device, the primary mixing is followed by a secondary reaction zone resulting in formation of sludge blanket?

View solution

Q. In which type of tube settler, tubes are slightly inclined in the direction of normal flow?

View solution

Q. Which of the following statement is wrong regarding filtration?

View solution

Q. In which action of filtration, particles coarser than the void size is arrested?

View solution

Q. In which action of filtration, colloidal particles are removed?

View solution

Q. Which is the first zone of purification in a sand bed?

View solution