The maximum depth of sedimentation tanks, is kept__________________?

Related Mcqs:

1. The detention period for plain sedimentation water tanks, is usually____________________?

   A. 4 to 8 hours B. 8 to 16 hours C. 16 to 24 hours D. 24 to 36 hours...

2. The normal values of over flow rates for secondary 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 10,000 litres/sqm/day...

3. 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...

4. The normal values of over flow rates for sedimentation tanks using coagulant, 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...

5. Inter-distance between ventilation columns in a sewer line is kept__________________?

   A. 25 to 50 m B. 50 m to 100 m C. 100 m to 150 m D. 150 m to 300 m...

6. In a sedimentation tank (length L, width B, depth D) the settling velocity of a particle for a discharge Q, is____________________?

   A. Q/(B × D) B. Q/(L × D) C. Q/L D. Q/(B × L)...

7. The dimensions of a rectangular settling tank are: length 24 m, width 6 m and depth 3 m. If 2 hour detention period for tanks is recommended, the rate of flow of sewage per hour, is_____________________?

   A. 204 cu.m B. 208 cu.m C. 212 cu.m D. 216 cu.m...

8. The digested sludge from septic tanks, is removed after a maximum period of__________________?

   A. 3 years B. 3.5 years C. 4 years D. 5 years...

9. The sewage discharge in a detritus tank of a treatment plant is 576 litres/sec with flow velocity of 0.2 m/sec. If the ratio of width to depth is 2, the depth is____________________?

   A. 100 cm B. 110 cm C. 120 cm D. 150 cm...

10. In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,______________?

    A. Is only provided B. Is doubled C. Is trebled D. Is not enough...