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 Less than 0.1 mm Less than 0.01 mm Greater than 0.1 mm Less than 0.05 mm Less than 0.1 mm Less than 0.01 mm Greater than 0.1 mm ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The normal values of over flow rates for sedimentation tanks using coagulant, ranges between 80,000 to 100,000 litres/sqm/day 40,000 to 50,000 litres/sqm/day 25,000 to 35,000 litres/sqm/day 50,000 to 60,000 litres/sqm/day 80,000 to 100,000 litres/sqm/day 40,000 to 50,000 litres/sqm/day 25,000 to 35,000 litres/sqm/day 50,000 to 60,000 litres/sqm/day ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering As compared to fresh river water, sea water contains oxygen 10% less 20% less 10% more 20% more 10% less 20% less 10% more 20% more ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Drop manholes are the manholes Having drains at different levels Without manhole covers Without entry ladders With depths more than 3.5 m Having drains at different levels Without manhole covers Without entry ladders With depths more than 3.5 m ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Cement concrete sewers are only suitable if non-scouring velocity is between 3.0 to 4.0 m/sec 3.5 to 4.5 m/sec 2.5 to 3.0 m/sec 4.5 to 5.5 m/sec 3.0 to 4.0 m/sec 3.5 to 4.5 m/sec 2.5 to 3.0 m/sec 4.5 to 5.5 m/sec ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Self-cleansing velocity is Velocity at dry weather flow Velocity of water in a pressure filter Velocity at which no accumulation remains in the drains Velocity of water at flushing Velocity at dry weather flow Velocity of water in a pressure filter Velocity at which no accumulation remains in the drains Velocity of water at flushing ANSWER DOWNLOAD EXAMIANS APP
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