Category: Waste Water Engineering

A. Screening
B. Sedimentation
C. Oxidation
D. All the above

A. Fit for discharge into any open drain
B. Foul and contains dissolved and suspended solids
C. As good as that from a complete treatment
D. None of these

A. 0.9 cm
B. 1.2 m
C. 1.5 m
D. > 1.5 m

A. Size of the sewer
B. Shape of the sewer
C. Roughness of sewer surface
D. All the above

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

A. A trunk sewer
B. An outfall sewer
C. A main sewer
D. An intercepting sewer

A. One pipe
B. Two pipes
C. Three pipes
D. Four pipes

A. 0.112 kg in suspension
B. 0.112 kg in solution
C. 0.225 kg in solution
D. Both A. and C. of above

A. pH value indicates acidity and alkalinity of sewage
B. In acidic sewage, the pH value is less than 7
C. In alkaline sewage, the pH value is more than 7
D. All the above

A. Horizontally
B. Vertically
C. At an angle of 30°
D. At an angle of 60°