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%
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Certificate: No
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1 / 30

1. The water supply pipeline should be tested at a specified pressure for

a) one hour

b) two hours

c) three hours

d) four hours

2 / 30

2. The type of joint used in HDP pipe is

a) butt welding

b) solvent welding

c) thread joint

d) dresser coupling joint

3 / 30

3. Iron in water causes

a) stains on clothes

b) eutrophication

c) rust

d) corrosion

4 / 30

4. The capacity of Guheswari STP is:

a) 15.4 Mld

b) 1.1 Mld

c) 0.50 Mld

d) 12.1 Mld

5 / 30

5. Surface water is obtained from

a) well

b) spring

c) artesian well

d) rain

6 / 30

6. 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

7 / 30

7. The suitable system of sanitation for an area having rainfall for only one season is:

a) separate system

b) combined system

c) partially combined system

d) all of the above

8 / 30

8. The peak water consumption hours as recommended by the Department of Water Supply and Sewerage (DWSS) is.... hours.

a) 5.00-7.00

b) 7.00-12.00

c) 12.00-17.00

d) 17.00-19.00

9 / 30

9. Inverted siphon is called:

a) special sewer

b) general sewer

c) storm sewer

d) none of the above

10 / 30

10. Aeration of water is done by

a) spray nozzles

b) cascading

c) trickling bed

d) all of the above

11 / 30

11. 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)

a) 0.25d

b) 0.50d

c) 0.75d

d) 0.95d

12 / 30

12. A circular section for a sewer is preferred only up to a diameter of:

a) 10 cm

b) 20 cm

c) 30 cm

d) 60 cm

13 / 30

13. The clarigesters are:

a) circular septic tanks

b) circular imhoff double storage tanks without bottom hoppers

c) rectangular septic tanks

d) none of the above

14 / 30

14. The pressure at the inlet and outlet in a break pressure tank is

a) zero and 1 m

b) 1 m and zero

c) zero and zero

d) 1 m and 1 m

15 / 30

15. 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

16 / 30

16. Which is the oldest waterworks in Nepal?

a) Bhim Dhara scheme

b) Bir Dhara scheme

c) Sundarijal scheme

d) Dudh Pokhari scheme

17 / 30

17. The SODIS method of water purification is a process of:

a) Chlorination

b) Solar disinfection

c) System of disinfected integral supply

d) Supply of disinfected and improved water system

18 / 30

18. Inverted siphon is made of:

a) one pipe

b) two pipes

c) three pipes

d) four pipes

19 / 30

19. To compensate for losses, thefts, and wastage of water, an allowance made of (as per NWSC)

a) 5%

b) 10%

c) 15%

d) 35%

20 / 30

20. Choose the odd statement:

a) sewage is received in a wet well

b) sewage is received in a dry well

c) both of the above

d) none of the above

21 / 30

21. Septic tanks are best suited for:

a) municipalities

b) industries

c) scattered residences

d) congested areas

22 / 30

22. The head developed in a centrifugal pump, at zero discharge is known as

a) low head

b) high head

c) medium head

d) shut off head

23 / 30

23. 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

24 / 30

24. Inverted siphon is called:

a) depressed sewer

b) sag sewer

c) both of the above

d) none of the above

25 / 30

25. The sewage in an inverted siphon will flow under what condition?

a) Air

b) Vacuum

c) Pressure

d) Gravity

26 / 30

26. The layout of the distribution system that is suitable for haphazardly growing cities is:

a) dead-end system

b) grid iron system

c) ring system

d) radial system

27 / 30

27. To determine the velocity of flow of underground water, the most commonly used non-empirical formula is

a) Darcy's formula

b) Slitcher's formula

c) Hazen's formula

d) Lacy's formula

28 / 30

28. Which traps have parallel legs?

a) P-Trap

b) Q-Trap

c) gully trap

d) S-Trap

29 / 30

29. The pattern of sanitation most suitable for a sloppy area is:

a) zone pattern

b) fan pattern

c) radial pattern

d) perpendicular pattern

30 / 30

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

a) decreases

b) increases

c) remains constant

d) none of the above

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Water Supply & Sanitation Engineering Online Test – Paper 2

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