Q. _____ is the amount of oxygen required to oxidize both organic and inorganic matter in sewage.

View solution

Q. COD is abbreviated as ___________

View solution

Q. The oxidizing agent used in COD test is ___________

View solution

Q. 5 days BOD at 20°C is ___ of total demand.

View solution

Q. Which of the following expression is correct regarding deoxygenation constant where symbols have their usual meaning?

View solution

Q. Which of the following is a prime lake pollutant?

View solution

Q. The turbulence decreases the DO content of water.

View solution

Q. The dilution factor is expressed by _____________

View solution

Q. The tolerance limit of BOD of sewage to be disposed on land is ____________

View solution

Q. The tolerance limit of pH value of sewage to be discharged into sea water is ____________

View solution

Q. The dilution factor is 400. What should be the type of treatment given to the water?

View solution

Q. The tolerance limit of oil and grease of sewage to be disposed on land is ____________

View solution

Q. The minimum depth to which sewage should be discharged of sea water is ____________

View solution

Q. The tolerance limit of COD of sewage to be discharged in sea water is ____________

View solution

Q. The pollution zones in the river are divided into how many types?

View solution

Q. In which pollution zone of the river, growth of algae reappear?

View solution

Q. In which pollution zone of the river, the dissolved oxygen reduced to 0?

View solution

Q. Which is the third zone of pollution in the river?

View solution

Q. In which pollution zone of the river, water retains its original dissolved oxygen concentration?

View solution

Q. The fishes were present in the river, but algaes were not able to survive. What is the zone of pollution of the river?

View solution