The settlement of a particle in sedimentation tank, is affected by_____________________?

Related Mcqs:

1. 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)...

2. The ratio of design discharge to the surface area of a sedimentation tank is called____________________?

   A. Surface loading B. Overflow rate C. Overflow velocity D. All of these...

3. The discharge per unit plan area of a sedimentation tank, is generally called________________?

   A. Over flow rate B. Surface loading C. Over flow velocity D. All the above...

4. The settling velocity of the particles larger than 0.06 mm in a settling tank of depth 2.4 is 0.33 m per sec. The detention period recommended for the tank, is____________________?

   A. 30 minutes B. 1 hour C. 1 hour and 30 minutes D. 2 hours...

5. 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...

6. 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...

7. 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...

8. In primary sedimentation, the 0.2 mm inorganic solids get separated if specific gravity is_________________?

   A. 2.25 B. 2.50 C. 2.55 D. 2.65...

9. The maximum depth of sedimentation tanks, is kept__________________?

   A. 3 m B. 3.5 m C. 4 m D. 4.5 m...

10. 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...