Water Supply & Sanitation Engineering Online Test – Paper 2

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Vikash chaudhary

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Total Questions: 30
Time Allotted: 30 minutes
Passing Score: 50%
Randomization: Yes
Certificate: No
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1 / 30

1. Dengue is termed as which type of disease?

a) Waterborne

b) Water washed

c) Water based

d) Water related

2 / 30

2. PH value is a symbol for....material:

a) hydrogen

b) magnesium

c) calcium

d) sodium

3 / 30

3. The water supply demand in a fully plumbed system in Nepal context

a) 45 lpcd

b) 65 lpcd

c) 112 lpcd

d) 135 lpcd

4 / 30

4. The main pipes must be designed to carry

a) 3 times the average demand

b) 4 times the average demand

c) 1 times the average demand

d) 2 times the average demand

5 / 30

5. The radius of influence of the well varies with

a) rate of pumping

b) water table

c) types of well

d) none of the above

6 / 30

6. 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?

a) 10 mg/l

b) 5 mg/l

c) 1 mg/l

d) none of the above

7 / 30

7. In distribution pipes, drain valves are provided at

a) lower point

b) higher point

c) junction points

d) anywhere

8 / 30

8. Which is in the correct order?

a) house s.-Lateral s.-Branch s.-Sub-main s.-Main (Trunk)-outfall sewer

b) house s.-Lateral s.-Branch s.-Sub-main s.-Outfall s.-Main (Trunk) sewer

c) main (Trunk)-Outfall s.-House s.-Lateral s.-Branch s.-Sub-main sewer

d) lateral s.-Branch s.-Sub-main s.-Main (Trunk)-Outfall s-House sewer

9 / 30

9. A communicable disease is

a) cancer

b) fluorosis

c) tuberculosis

d) goitre

10 / 30

10. The flow in the sewers is minimum during which hours?

a) Night

b) Morning

c) Day

d) Evening

11 / 30

11. A sewer, which gets its flow from a number of transverse sewers, is known as:

a) interceptor

b) interconnector

c) head sewer

d) branch sewer

12 / 30

12. Shrouding is the process of filling gravel, bajri, etc., in

a) slotted tube well

b) strainer tube well

c) perforated tube well

d) cavity tube well

13 / 30

13. The water collected for the sample from the

a) 10-20 cm below from the surface

b) 20-30 cm below from the surface

c) 30-40 cm below from the surface

d) 40-50 cm below from the surface

14 / 30

14. Sanitary sewage means:

a) domestic sewage

b) industrial sewage

c) both (a) and (b) above

d) none of the above

15 / 30

15. The types of diseases caused due to the lack of water are known as

a) waterborne

b) water-washed

c) water-based

d) water vector

16 / 30

16. Steel pipes are

a) generally laid underground and no expansion joint is required

b) connected by riveted or welded joints

c) suitable for withstanding high internal pressure

d) all of the above

17 / 30

17. Stoneware pipes are generally not used for sewer mains because they are:

a) weak in compression

b) weak in tension

c) hydraulically less efficient

d) less resistant to organic corrosion

18 / 30

18. Which device warns that the liquid is above the pump level?

a) High-level alarm

b) Check valve

c) Union

d) Pump lift chain

19 / 30

19. Copper pipes are

a) highly resistant to acidic and alkaline water

b) easy to bend and do not sag if used for hot water supply

c) not liable to corrosion

d) all of the above

20 / 30

20. Sewer preferred for a combined system of sewage is:

a) rectangular sewer

b) circular sewer

c) egg-shaped sewer

d) all of the above

21 / 30

21. Sluice valves in main water supplies are

a) used to regulate the flow

b) spaced about 5 km apart

c) generally provided at the summits

d) all of the above

22 / 30

22. Where it is not possible to obtain self-cleansing velocities for sewers, flush are provided with the minimum available head of:

a) 1-3 m

b) 3-5 m

c) 5-7 m

d) 7-10 m

23 / 30

23. Most suitable section of sewer in a separate sewage system is:

a) circular section

b) rectangular section

c) egg-shaped section

d) modified egg-shaped section

24 / 30

24. Watershed control method is used to control

a) water in the pipeline

b) sedimentation in the reservoir

c) algae in the reservoir

d) bacteria in water

25 / 30

25. Baffle wall in septic tank is:

a) Short side wall

b) Long side wall

c) Honeycomb inner wall

d) None of the above

26 / 30

26. Goaty water refers to...

a) odour of water

b) turbidity of water

c) colour of water

d) all of the above

27 / 30

27. Inspection arm is provided in:

a) manhole

b) drop manhole

c) lamp hole

d) clean out

28 / 30

28. The type of joint used in HDP pipe is

a) butt welding

b) solvent welding

c) thread joint

d) dresser coupling joint

29 / 30

29. The main function of a manhole is:

a) cleaning of sewer

b) inspection of sewer

c) joining different types of sewer

d) joining different grade of sewer

30 / 30

30. In water analysis, the test carried out is

a) physical

b) chemical

c) biological

d) all of the above

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Water Supply & Sanitation Engineering Online Test – Paper 2

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