A. Brick sewer
B. Cast iron sewer
C. R.C.C. sewer
D. Lead sewer
0
The formula which accepts the value of rugosity coefficient n = 0.012 to be used in Manning’s formula, is given by______________________?
0
Skimming tanks are__________________?
A. Bazin
B. Crimp and Bruges
C. William-Hazen
D. Kutter
0
If the peak discharge of a storm water drain (S.W. Drain) is expected to exceed 150 cumecs, the free board to be provided, is_________________?
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
0
The detention period for plain sedimentation water tanks, is usually____________________?
A. 100 cm
B. 90 cm
C. 80 cm
D. 50 cm
0
Hume steel pipes are__________________?
A. 4 to 8 hours
B. 8 to 16 hours
C. 16 to 24 hours
D. 24 to 36 hours
0
If the length of overland flow from the critical point to the mouth of drain is 13.58 km and difference in level between the critical point and drain mouth is 10 m, the inlet time is___________________?
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.
0
In a trickling filter_________________?
A. 2 hours
B. 4 hours
C. 6 hours
D. 8 hours
0
The rate of accumulation of sludge in septic tanks is recommended as____________________?
A. Filtration process is used
B. Biological action is used
C. Neither A. nor B.
D. Both A. and B.
0
15 cumecs, the depth d and width are related by For drains up to___________________?
A. 30 litres/person/year
B. 25 litres/person/year
C. 30 litres/person/month
D. 25 litres/person/month
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