A. 30 litres/person/year
B. 25 litres/person/year
C. 30 litres/person/month
D. 25 litres/person/month
A. Filtration process is used
B. Biological action is used
C. Neither A. nor B.
D. Both A. and B.
A. 2 hours
B. 4 hours
C. 6 hours
D. 8 hours
A. Steel pipes
B. Steel shell coated from inside with cement mortar
C. Steel shell coated from outside with cement mortar
D. Both B. and C.
A. 4 to 8 hours
B. 8 to 16 hours
C. 16 to 24 hours
D. 24 to 36 hours
A. 100 cm
B. 90 cm
C. 80 cm
D. 50 cm
A. Used to remove the grease and oil
B. Those from which sludge is skimmed out
C. Tanks provided with self- cleansing screens
D. Improved version of grit chambers
A. Bazin
B. Crimp and Bruges
C. William-Hazen
D. Kutter
A. Brick sewer
B. Cast iron sewer
C. R.C.C. sewer
D. Lead sewer
A. Its intensity
B. Its direction
C. Its frequency
D. All the above