The coagulant widely used for sewage treatment, is_________________?

Related Mcqs:

1. The most widely used pump for lifting sewage is_________________?

   A. Centrifugal pump B. Reciprocating pump C. Pneumatic ejector D. Air pressure pump...

2. The coagulant which is generally not used for treating the sewage, is__________________?

   A. Alum B. Ferric chloride C. Ferric sulphate D. Chlorinated copperas...

3. If a 2% solution of sewage sample is incubated for 5 days at 20°C and the dissolved oxygen depletion was found to be 8 mg/l. The BOD of the sewage is_________________?

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

4. If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage is_________________?

   A. 50 mg/l B. 100 mg/l C. 150 mg/l D. 250 mg/l...

5. Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is ?

   A. Centrifugal pump B. Pneumatic ejector C. Reciprocating pump D. None of these...

6. The ratio of maximum sewage flow to average sewage flow for mains up to 1 m in diameter, is___________________?

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

7. The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is_____________________?

   A. 0.05552 cumec B. 0.05554 cumec C. 0.05556 cumec D. 0.0556 cumec...

8. A five day B.O.D. at 15°C of the sewage of a town is 100 kg/day. If the 5 day B.O.D. per head at 15°C for standard sewage is 0.1 kg/day, the population equivalent is____________________?

   A. 100 B. 1000 C. 5000 D. 10000...

9. If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is____________________?

   A. 200 ppm B. 225 ppm C. 250 ppm D. None of these...

10. If q is the average sewage flow from a city of population P, the maximum sewage flow______________?

    A. Q = [(4 + )/(18 + )] q B. Q = [(18 + P)/(4 + )] q C. Q = [(18 + )/(4 + )] q D. Q = [(5 + )/((15 + )] q...