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. Thrust blocks are installed wherever there is a

a) change in the direction or size of the pipeline

b) change in the pressure line diagram

c) pipeline ends at a dead end

d) all of the above

2 / 30

2. Gastrointestinal irritation is produced because of excess of the following in water

a) chlorides

b) sulphates

c) nitrates

d) phosphates

3 / 30

3. Break pressure tank is generally provided in rural water supply schemes if static head exceeds

a) 30 m

b) 40 m

c) 50 m

d) 60 m

4 / 30

4. Selection of material for the pipe depends on

a) carrying capacity of the pipe

b) durability and life of the pipe

c) effect of water to be conveyed on the pipe material

d) all of the above

5 / 30

5. Water demand for public use as compared to the total demand, kept in the design of waterworks for a city, is

a) 5%

b) 10%

c) 20%

d) 25%

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. A manhole is generally provided at each:

a) bend

b) junction

c) change of gradient

d) change of sewer diameter

8 / 30

8. Depth of shallow tube well shall not be more than (considering economic point):

a) 30 m

b) 40 m

c) 50 m

d) 60 m

9 / 30

9. 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

10 / 30

10. Water for domestic consumption should be:

a) colorless, odorless & tasteless

b) free from dissolved salts

c) hygienically safe

d) attractive for looks

11 / 30

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

a) hydrogen

b) magnesium

c) calcium

d) sodium

12 / 30

12. An advantage of the intermittent system of the water supply system:

a) Repairs can be carried out during non-supply hours

b) Chances of wastage of water are less

c) Less quantity of water is used

d) All of the above

13 / 30

13. The amount of BOD in domestic water should be

a) 1 ppm

b) 2 ppm

c) 3 ppm

d) nil

14 / 30

14. In the single-stack system of plumbing, the number of vertical pipes is:

a) 1

b) 2

c) 3

d) 4

15 / 30

15. The water supply demand in a day school without a boarder should be

a) 10 lpcd

b) 20 lpcd

c) 30 lpcd

d) 40 lpcd

16 / 30

16. Mass curve is used for the determination of

a) area of reservoir

b) depth of reservoir

c) capacity of reservoir

d) all of the above

17 / 30

17. Inverted siphon is made of:

a) one pipe

b) two pipes

c) three pipes

d) four pipes

18 / 30

18. The type of joint used in HDP pipe is

a) butt welding

b) solvent welding

c) thread joint

d) dresser coupling joint

19 / 30

19. HGL should always be...... above the GL

a) 5 m

b) 10 m

c) 15 m

d) 20 m

20 / 30

20. Pipes for water supply are tested for

a) pressure

b) leakage

c) dimensions

d) all of the above

21 / 30

21. 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

22 / 30

22. Air inlet valve is provided in water mains at

a) summit of the pipe

b) downstream of the sluice valve

c) both (a) and (b) of the above

d) upstream of the sluice valve

23 / 30

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

a) total dissolved solids

b) bacteria

c) iron and manganese

d) suspended solids

24 / 30

24. A sewer, which receives the discharge of a number of house sewers, is called:

a) house sewer

b) lateral sewer

c) intercepting sewer

d) sub-main sewer

25 / 30

25. 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

26 / 30

26. Time of concentration depends upon:

a) slope of the catchment

b) intensity of rainfall

c) nature of soil

d) all of the above

27 / 30

27. The capacity of Guheswari STP is:

a) 15.4 Mld

b) 1.1 Mld

c) 0.50 Mld

d) 12.1 Mld

28 / 30

28. Inspection arm is provided in:

a) manhole

b) drop manhole

c) lamp hole

d) clean out

29 / 30

29. Water security plan is prepared:

a) For consumptive use

b) For long-term minimization of hazards and risks

c) For quality water storage and uses for different purposes

d) For community participation

30 / 30

30. In order to consider temperature changes, metal pipes are usually provided with

a) expansion joints

b) contraction joints

c) anchorages

d) pressure relief valves

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Water Supply & Sanitation Engineering Online Test – Paper 2

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