A. Over flow rate
B. Surface loading
C. Over flow velocity
D. All the above
Related Mcqs:
- 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 - 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) - The settlement of a particle in sedimentation tank, is affected by_____________________?
A. Velocity of flow
B. Viscosity of water
C. Size and shape of solid
D. All the above - 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 - 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 - 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 - 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 - 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 - The maximum depth of sedimentation tanks, is kept__________________?
A. 3 m
B. 3.5 m
C. 4 m
D. 4.5 m - 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
