A. Tops of both the sewers are at the same level
B. Top of smaller sewer is kept lower
C.  Top of larger sewer is kept lower
D. None of them

A.  Cast iron sewer
B. R.C.C. sewer
C. Lead sewer
D. Brick sewer

A. Bottom side
B. Horizontal side
C. Top side
D. None

A. Less than the self-cleansing velocity
B. Less than 10 m/sec
C. More than the self-cleansing velocity
D. ore than 20 m/sec

A. Kitchen sinks
B. Toilets
C. Bath rooms
D. Wash basins

A. 0.225 kg in solution
B. 0.112 kg in suspension
C. 0.112 kg in solution
D. Both a and b

A. Settleable solids
B. Total in organic solids
C. Total organic solids
D. Total solids

A. Sedimentation tanks with high rate trickling filters
B. A sedimentation tank and an activated sludge treatment plant
C. A plant consisting of Imhoff tanks with low rate trickling filters
D. None of them

A. Between 150 to 200
B. Between 200 to 300
C. Less than 150
D. More than 500

A. Pressure sewers are designed to be safe in tension
B. The sewage when running full from inside, is called internal pressure
C. The internal pressure if any, causes tensile stress in the pipe material
D. All the above