For the same solid content, if the quantity of sludge with moisture content of 98% is X, then the quantity of sludge with moisture content of 96% will be__________________?
A. X/4
B. X/2
C. X
D. 2X
Environmental Engineering
For normal sludge, the value of sludge index for Indian conditions is________________?
For normal sludge, the value of sludge index for Indian conditions is________________?
A. 0 to 50
B. 50 to 150
C. 150 to 350
D. 350 to 500
For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as___________________?
For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as___________________?
A. 4.5 to 6.0
B. 6.5 to 8.0
C. 8.5 to 10.0
D. 10.5 to 12.0
Composting and lagooning are the methods of_______________?
Composting and lagooning are the methods of_______________?
A. sludge digestion
B. sludge disposal
C. sedimentation
D. filtration
In facultative stabilization pond, the sewage is treated by________________?
B. algae only
C. dual action of aerobic bacteria and anaerobic bacteria(Correct)
D. sedimentation
The maximum efficiency of BOD removal is achieved in______________?
B. oxidation ditch(Correct)
C. aerated lagoons
D. trickling filters
Which of the following unit works in anaerobic conditions ?
Which of the following unit works in anaerobic conditions ?
A. sludge digestion tank
B. sedimentation tank
C. activated sludge treatment
D. trickling filters
If the sewage contains grease and fatty oils, these are removed in_________________?
B. detritus tanks
C. skimming tanks(Correct)
D. sedimentation tanks
Laying of sewers is usually done with the help of________________?
B. a compass
C. sight rails and boning rods(Correct)
D. a plane table
Sewerage system is designed for_______________?
B. minimum flow only
C. average flow only
D. maximum and minimum flow(Correct)