Interview question based on skill :
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Total Questions: 20
1. The BOD value of the domestic sewage is about__________
Correct Answer is : 166
2. Non hazardous organic wastes from the sewage is to be separated from the___________
Correct Answer is : Toxic industrial wastes
3. Domestic water treatment is carried out under __________ conditions.
Correct Answer is : Aerobic
4. The BOD value of the industrial waste must be about _________
Correct Answer is : 200
5. The BOD value of the food industry is about ___________
Correct Answer is : 745
6. In domestic water treatment, after the primary treatment _________ is done.
Correct Answer is : Screening
7. In the domestic water process, when air is sent during the active sludge, then _________ released.
Correct Answer is : Carbondioxide
8. In final step of the domestic water process, the effluent contain ___________ BOD.
Correct Answer is : 25ppm
9. Aerobic process is also called as ___________
Correct Answer is : Activated sludge process
10. By aerobic process _________ of biodegradable water is converted into the biomass.
Correct Answer is : 0.5
11. ___________ poisoning water in Japan is from fishes.
Correct Answer is : Arsenic
12. Fishes can store more quantity of ___________ in their bodies.
Correct Answer is : Mercury
13. Waste water released from _________ are not the sources of bacteria.
Correct Answer is : Industries
14. Bacteria and micro organisms present in the water will cause _________ in human and animals.
Correct Answer is : Intestinal tract
15. Infectious hepatitis is caused by ___________
Correct Answer is : Viruses
16. Amoebic dysentery is caused by ___________
Correct Answer is : Protozoa
17. Bacteria in water causes ________
Correct Answer is : Typhoid
18. Helminth in the water causes __________
Correct Answer is : Hook worm
19. The ____________ is an important requirement of the aquatic life.
Correct Answer is : Dissolved oxygen
20. The optimum value in natural water is ________
Correct Answer is : 4-6ppm
