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Environmental Engineering Practice Test: Hydraulic Design of Sewers
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Avg score: 70% • Most missed: “The upper portion of Egg shaped sewer is called as _____”

The hydraulic design of sewers involves the movement of wastewater through sewer pipes. The design depends on the area where the sewage system is being developed. The design of sewer systems is important because inappropriate performance can cause pollution and disruptions in the urban living environment.

Topic include: Hydraulic Formulae, Minimum and Maximum Velocity of Flow, Hydraulic Elements of Circular Sewers, Egg Shaped Sewers and Other Sewer Sections.

 

Environmental Engineering Practice Test: Hydraulic Design of Sewers
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25 Questions

1. The non scouring velocity required for cast iron sewer pipes is __________
2. The Egg shaped sewer provides ____ velocity for low flows over the circular sewer of equal capacity.
3. The flow of sewage in the sewers is independent of its slope and geometry.
4. _______ is the velocity at which the solid matter in sewage remained in suspended form.
5. Which of the following is the expression of the Manning’s formula?
6. The expression for the self cleansing velocity is given by ____________
7. The self cleansing velocity required for coarse sand is __________
8. A circular sewer having 0.4m diameter is flowing with velocity 2m/Sec. If the gradient of sewer is 1 in 90. Find the value of Chezy’s coefficient?
9. The non scouring velocity is 260cm/Sec. The type of material of the sewer is __________
10. The hydraulic mean depth of a circular section running full is __________
11. The value of Kutter’s coefficient for cast iron is ____________
12. The diameter of the sewer is 23cm. What should be the self cleansing velocity?
13. Which of the following order is correct regarding Hazen and William’s coefficient?

i. Steel pipe

ii. Cement lined pipe

iii. Wood stave pipe

iv. Asbestos cement pipe
14. A circular section of sewer gives _______ area for a given perimeter.
15. The diameter of the circular sewer is 0.2m. The desired depth of flow is __________
16. The ratio of the width of the standard section and new shaped section of Egg shaped section is __________
17. Which of the following sewer is called as an ovoid sewer?
18. The expression of the Chezy’s formula is given by ____________
19. One side walkway is a type of __________
20. Which of the following is incorrect regarding Egg shaped sewer?
21. The radius of invert of the standard section of Egg shaped sewer is ____ of the new shaped section.
22. The value of Bazen’s constant for good earthen channels is ____________
23. The diameter of a circular sewer is 0.8m. The desired depth of flow is __________
24. Which of the following has a minimum manning’s coefficient in terms of fair interior surface?
25. The height of standard section of Egg shaped sewer is ______ the new shaped section.

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