Water Supply & Sanitation Engineering Online Test – Paper 2

1. Steel pipes are

2. The approximate diameter of a water mains for supplying 7.15 mld with 1.21 m/sec velocity flow will be

3. The colour of water is measured on the platinum cobalt scale with the help of

4. 2 ml of sewage, having BOD-500 mg/l, is diluted to 200 ml, and incubated for 5 days at 20°C. If the D.O. content after 5 days is found to be 5 mg/l, what was the initial D.O. content of the diluted sample?

5. A structure constructed to remove obstacles in the sewer is known as:

6. Most suitable section, when the maximum and minimum flow ratio is not much, is:

7. Traddle pump is operated by

8. Sluice valves in main water supplies are

9. A water supply system is said to be continuous when it is supplied for:

10. Most commonly used section in the grade aqueduct is

11. Tuberculation is caused in a metal pipe due to

12. If the diameter of the main pipe is taken less than the economical diameter, then

13. A wrong nominal internal diameter in mm for a cast iron (spun) pipe is

14. With the increase in the size of the water pipe, the permissible velocity (If discharge is constant)

15. As per Buston's formula, fire demand for in liters per minute for a population of p in thousands, is given by

16. A circular section of sewer has the advantage of:

17. Water for domestic consumption should be:

18. In an egg-shaped sewer section, the maximum discharge occurs when the depth of flow is: (where d is the total depth of the section)

19. Which of the following impurities in water is removed by the sedimentation process?

20. A pressure conduit laid underground may not be subjected to

21. The amount of BOD in domestic water should be

22. Manholes on sewer lines are provided for:

23. Pressure relief valve is provided to prevent

24. The valve which allows water to flow in one direction but prevents its flow in the reverse direction is

25. "Dental Caries" will be absent where the following is present

26. The design discharge for the combined system shall be taken equal to:

27. The specific gravity of sewage is:

28. Sewage is treated by aerobic bacteria action in:

29. The quantity of flushing water required for pour-flush water seal latrine is:

30. An aquiclude is