Water Supply & Sanitation Engineering Online Test

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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. Break pressure tank in a water supply system is incorporated to:

a) Store water under pressure

b) Treat water by adequate pressure

c) Release the pressure generated in the pipe

d) Break the pressure

2 / 30

2. 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

3 / 30

3. Methemoglobinemia (Blue babies) is due to

a) oxidation of hemoglobin

b) nitrates replacing oxygen in hemoglobin

c) nitrites replacing oxygen in hemoglobin

d) carbon monoxide replacing oxygen in hemoglobin

4 / 30

4. Turbidity of water sample depends on

a) concentration and density of suspended and colloidal solids

b) concentration of suspended, colloidal, and dissolved solids

c) concentration of organic and inorganic matter

d) concentration, size, shape, and refractive index of suspended solids

5 / 30

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

a) least parameter for a given area

b) offers the least opportunities for deposits

c) more suitable when the discharge is approximately constant

d) all of the above

6 / 30

6. The pump does not require any power, energy, fuel, etc., for its working is

a) centrifugal

b) hydraulic ram

c) reciprocating

d) rotary

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. 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

9 / 30

9. Time of concentration depends upon:

a) slope of the catchment

b) intensity of rainfall

c) nature of soil

d) all of the above

10 / 30

10. An aquiclude is

a) a non-artesian aquifer

b) a large underground water body

c) a confined bed of impervious material between aquifers

d) an artesian aquifer

11 / 30

11. The relation between porosity, specific yield, and specific retention is given by

a) porosity = specific yield + specific retention

b) porosity = specific yield - specific retention

c) specific yield = porosity + specific retention

d) none of the above

12 / 30

12. The types of formwork provided for ferrocement tank in rural water supply schemes are

a) steel

b) wood

c) HDP pipe

d) all of the above

13 / 30

13. The distribution mains in a water supply system are designed for

a) maximum daily demand

b) peak hourly demand

c) average daily demand

d) maximum hourly demand on the maximum consumption day

14 / 30

14. Grade aqueducts are not allowed to run

a) one-fourth full

b) half

c) three

d) full

15 / 30

15. Designation of GI pipe is done with:

a) internal diameter

b) external diameter

c) center line

d) none of the above

16 / 30

16. Goaty water refers to...

a) odour of water

b) turbidity of water

c) colour of water

d) all of the above

17 / 30

17. Pipes for water supply are tested for

a) pressure

b) leakage

c) dimensions

d) all of the above

18 / 30

18. The characteristics of fresh and septic sewage are:

a) alkaline and acidic

b) acidic and alkaline

c) acidic and acidic

d) alkaline and alkaline

19 / 30

19. Inspection arm is provided in:

a) manhole

b) drop manhole

c) lamp hole

d) clean out

20 / 30

20. Booster pump is used for

a) water supply

b) sewage pumping

c) pressure increase

d) drinking purposes

21 / 30

21. Lead in water causes

a) plumbo solvency

b) stains on clothes and paper

c) damages water systems

d) permanent bluish skin

22 / 30

22. Disinfection of water involves.....

a) killing of diseases bacteria

b) produce of diseases of water

c) no change diseases bacteria

d) none of the above

23 / 30

23. The types of sewer suitable for a separate system where discharge is uniform are:

a) egg-shaped

b) horse-shoe

c) circular

d) elliptical

24 / 30

24. Letache is observed in:

a) septic tank

b) sewage

c) landfill

d) none of the above

25 / 30

25. The slope of the hydraulic grade line is always towards the well due to pumping. This line of depressed water table is called

a) drawdown curve

b) circle of influence

c) dynamic gradient

d) an inverted cone of depression

26 / 30

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

a) 300

b) 400

c) 500

d) 550

27 / 30

27. The rate of flow in an artesian spring is continuous and

a) increases in the rainy season

b) is constant in all conditions

c) increases as the water table rises

d) decreases in the drought season

28 / 30

28. The water which is not chemically pure but does not contain anything harmful to human health is known as

a) pure water

b) wholesome water

c) polluted water

d) none of the water

29 / 30

29. Aeration of water is done to

a) remove carbon dioxide and taste in water

b) remove taste and odour in water

c) increase the quantity of oxygen in water

d) all of the above

30 / 30

30. If the head of water is more than 100 m then the type of pipe used is

a) plastic

b) HDP

c) GI

d) PVC

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