Civil Engineering MCQs

2965 MCQs  (Page 288 of 297)

In a trickling filter_________________?
A. Filtration process is used
B. Biological action is used
C. Neither a. nor b.
D. Both a. and b.
The rate of accumulation of sludge in septic tanks is recommended as____________________?
A. 30 litres/person/year
B. 25 litres/person/year
C. 30 litres/person/month
D. 25 litres/person/month
Self-cleansing velocity is__________________?
A. Velocity at dry weather flow
B. Velocity of water at flushing
C. Velocity at which no accumulation remains in the drains
D. Velocity of water in a pressure filter
The sewer which resists sulphide corrosion, is____________________?
A. Brick sewer
B. Cast iron sewer
C. R.c.c. sewer
D. Lead sewer
Skimming tanks are__________________?
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