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

Related Mcqs:

1. Normal depth in open channel flow is the depth of flow corresponding to_______________?

   A. steady flow B. unsteady flow C. laminar flow D. uniform flow E. critical flow...

2. The gradient of sewers depends upon_________________?

   A. Velocity of flow B. Diameter of the sewer C. Discharge D. All the above...

3. In a residential colony, sewers of diameters 100 mm, 150 mm and 225 mm were laid with a gradient 1 in 120. Which portion of the sewage system does not choke in due course of time?

   A. 100 mm dia. B. 150 mm dia. C. 225 mm dia. D. All of these...

4. For trunk sewers more than 1.25 m in diameter, the ratio of the maximum daily sewage flow to the average daily sewage flow is assumed________________?

   A. 1.5 B. 2.0 C. 2.5 D. 3.0...

5. In Chezy’s formula V = C rs for calculating the velocity of flow in circular sewer of diameter running full, the value of hydraulic mean radius is_______________?

   A. D B. D /2 C. D/3 D. D/4...

6. If the depth of flow in a circular sewer is 1/4th of its diameter D, the wetted perimeter is______________?

   A. /2 B. /4 C. /3 D. D...

7. 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...

8. Boussinesq’s equation for ascertaining unit pressure at a depth on sewers due to traffic loads, is__________________?

   A. pt = 3H3p/2 Z5 B. pt = 2H3p/3 Z5 C. pt = 3H3p/2Z5 D. pt = 2 3p/3Z5...

9. 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...

10. The suitable cross-section of sewers to carry combined flow, is__________________?

    A. Circular B. Egg shaped C. Rectangular D. Horse shoe shaped...