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. As the diameter of the sewer increases, the self-cleaning velocity:

a) increases

b) decreases

c) remains constant

d) depends on other factors

2 / 30

2. Strainer type tube wells are considered unsuitable for

a) coarse gravel

b) fine sand strata

c) clean gravels

d) all of the above

3 / 30

3. Anti-siphonage pipe is connected to:

a) Top of PWC

b) Bottom of PWC

c) In the main pipe

d) None of the above

4 / 30

4. Designation of GI pipe is done with:

a) internal diameter

b) external diameter

c) center line

d) none of the above

5 / 30

5. Sterilized water is generally used for

a) domestic

b) medical

c) public

d) all of the above

6 / 30

6. Growth of the population can be conveniently represented by

a) arithmetical curve

b) geographical curve

c) logistic curve

d) straight line curve

7 / 30

7. 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

8 / 30

8. 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

9 / 30

9. The process of obtaining energy for their (bacteria) synthesis after the oxidation of organic or inorganic matter is called

a) photosynthesis

b) chemosynthesis

c) both

d) none

10 / 30

10. Abyssinian tube well is a special type of

a) strainer type tube well

b) cavity type tube well

c) slotted type tube well

d) perforated type tube well

11 / 30

11. 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

12 / 30

12. 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

13 / 30

13. The sewerage system originates from:

a) main sewers

b) branch sewers

c) lateral sewers

d) house sewers

14 / 30

14. Turbidity depends on the presence of the following in water

a) suspended solids

b) suspended solids and colloidal solids

c) any material capable of preventing light

d) intensity of coloration

15 / 30

15. The velocity of flow does not depend on:

a) grade of sewer

b) hydraulic mean depth of sewer

c) roughness of sewer

d) length of sewer

16 / 30

16. In Chezy's formula v=c√ms for calculating the velocity of flow in a circular sewer, the Chezy's constant c depends upon:

a) size of the sewer

b) shape of the sewer

c) roughness of the sewer

d) all of the above

17 / 30

17. Manhole is said to be medium if its depth is between:

a) 0.7-0.9 m

b) 0.9-1.2 m

c) 0.9-1.3 m

d) 0.9-1.5 m

18 / 30

18. If in the relative stability test on sewage, the period of incubation at 20°C is 15 days, the relative stability is:

a) 95.95%

b) 96.05%

c) 96.86%

d) 100%

19 / 30

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

a) zone pattern

b) fan pattern

c) radial pattern

d) perpendicular pattern

20 / 30

20. Detention time for the detritus tank is:

a) 1-2 minutes

b) 2-3 minutes

c) 3-4 minutes

d) 4-5 minutes

21 / 30

21. An egg-shaped section of sewer:

a) is economical than a circular section

b) is more stable than a circular section

c) provides self-cleansing velocity at low discharge

d) all of the above

22 / 30

22. Turbidity is measured on..........

a) standard silica scale

b) standard cobalt scale

c) diagonal scale

d) none of the above

23 / 30

23. The characteristics of fresh and septic sewage are:

a) alkaline and acidic

b) acidic and alkaline

c) acidic and acidic

d) alkaline and alkaline

24 / 30

24. The per capita consumption of a locality is affected by

a) climatic condition

b) quality of water

c) distribution pressure

d) all of the above

25 / 30

25. The pipe joint commonly used in a pumping station is

a) flexible joint

b) expansion joint

c) flanged joint

d) socket and spigot joint

26 / 30

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

a) Air

b) Vacuum

c) Pressure

d) Gravity

27 / 30

27. Gravity water supply system starts from

a) intake

b) collection chamber

c) BPT

d) faucet

28 / 30

28. 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

29 / 30

29. The pipe used to carry discharge from sanitary fittings like bathrooms, kitchens, etc., is:

a) waste pipe

b) soil pipe

c) vent pipe

d) anti-siphonage pipe

30 / 30

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

a) Darcy's

b) Slitcher's

c) Hazen's

d) Lacy's

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Water Supply & Sanitation Engineering Online Test – Paper 2

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