Category: Waste Water Engineering

A. 3 years
B. 3.5 years
C. 4 years
D. 5 years

A. 100 mg/l
B. 200 mg/l
C. 300 mg/l
D. 400 mg/l

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

A. House sewers
B. Lateral sewers
C. Branch sewers
D. Main sewers

A. Flourish in the presence of free oxygen
B. Consume organic matter as their food
C. Oxidise organic matter in sewage
D. All the above

A. 10 cm
B. 12 cm
C. 15 cm
D. 18 cm

A. Mean radius of sewer
B. Difference in heads between two points in circular pipes
C. Mean of radii in a pipe line of varying cross -sections
D. Cross-sectional area/wetted perimeter

A. The sewer pipes of sizes less than 0.4 m diameter are designed as running full at maximum discharge
B. The sewer pipes of sizes greater than 0.4 m diameter are designed as running 2/3rd or 3/4th full at maximum discharge
C. The minimum design velocity of sewer pipes is taken as 0.8 m/sec
D. All the above

A. 1.5
B. 2.0
C. 3.0
D. 4.0

A. Water test
B. Smoke test
C. Straightness test
D. All the above