Related Questions

The detention period and overflow rate respectively for plain sedimentation as compared to sedimentation with coagulation are generally
A Less and more
B Less and less
C More and less
D More and more
The overflow rate for plain sedimentation tanks is about
A 500 to 750 liters/hour/m2
B 1000 to 1250 liters/hour/m2
C 1250 to 1500 liters/hour/m2
D 1500 to 2000 liters/hour/m2
The normal value of over flow rates for plain primary sedimentation tanks, ranges between
A 25,000 to 35,000 litres/sqm/day
B 40,000 to 50,000 litres/sqm/day
C 50,000 to 60,000 litres/sqm/day
D 80,000 to 100,000 litres/sqm/day
The detention period in coagulation tanks is usually kept as
A 1 to 2 minutes
B 30 to 45 minutes
C 2 to 6 hours
D 2 to 6 days
In a sedimentation tank, the detention period for water ranges from __________ hours.
A 2 to 4
B 8 to 12
C 16 to 20
D 24 to 32
A rectangular tank 10 inch by 8 inch by 4 inch is filled with water. If all of the water is to be transferred to cube-shaped tanks, each one 3 inches on a side, how many of these smaller tanks are needed?
A 9
B 12
C 16
D 21
Percentage of bacterial load that can be removed from water by the process of plain sedimentation is about
A 10 to 25
B 50
C 75
D 100
For a continuous flow type of sedimentation tanks
A Width of the tank is normally kept about 6 m
B Length of the tank is normally kept 4 to 5 times the width
C Maximum horizontal flow velocity is limited to 0.3 m/minute
D All the above
The maximum depth of sedimentation tanks is limited to
A 3 m
B 4 m
C 5 m
D 6 m
The maximum depth of sedimentation tanks, is kept
A 3 m
B 3.5 m
C 4 m
D 4.5 m

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