Waste Water Engineering For efficient working of a sewer, it must be ensured that Both (A) and (B) A maximum velocity of 0.90 m/sec, is maintained at its maximum flow Neither (A) nor (B) Minimum velocity of 0.45 m/sec, is maintained at its minimum flow Both (A) and (B) A maximum velocity of 0.90 m/sec, is maintained at its maximum flow Neither (A) nor (B) Minimum velocity of 0.45 m/sec, is maintained at its minimum flow ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The drainage area of a town is 12 hectares. Its 40% area is hard pavement ( K = 0.85), the 40% area is unpaved streets (K = 0.20) and the remaining is wooded areas (K = 0.15). Assuming the time of concentration for the areas as 30 minutes and using the formula Ps = 900/(t + 60) the maximum run off is 0.15 cumec 0.10 cumec 0.12 cumec 0.20 cumec 0.15 cumec 0.10 cumec 0.12 cumec 0.20 cumec ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In sewers the highest non-scouring velocity is achieved in Glazed bricks sewers Cast iron sewers Cement concrete sewers Stone ware sewers Glazed bricks sewers Cast iron sewers Cement concrete sewers Stone ware sewers ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter Less than 0.05 mm Greater than 0.1 mm Less than 0.01 mm Less than 0.1 mm Less than 0.05 mm Greater than 0.1 mm Less than 0.01 mm Less than 0.1 mm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The sewer pipes Carry sewage as gravity conduits All listed here Are designed for generating self-cleansing velocities at different discharge Should resist the wear and tear caused due to abrasion Carry sewage as gravity conduits All listed here Are designed for generating self-cleansing velocities at different discharge Should resist the wear and tear caused due to abrasion ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The maximum depth of sedimentation tanks, is kept 3 m 3.5 m 4 m 4.5 m 3 m 3.5 m 4 m 4.5 m ANSWER DOWNLOAD EXAMIANS APP
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