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. The average discharge of a tube-well is about

a) 5 liters/sec

b) 50 liters/sec

c) 100 liters/sec

d) 500 liters/sec

2 / 30

2. Salvaging is:

a) extraction of essence from waste

b) dumping of solid waste

c) sanitary land filling of solid waste

d) none of the above

3 / 30

3. By boiling water, hardness can be removed if it is due to:

a) Calcium sulphate

b) Magnesium sulphate

c) Calcium nitrate

d) Calcium bicarbonate

4 / 30

4. Inverted siphon is called:

a) depressed sewer

b) sag sewer

c) both of the above

d) none of the above

5 / 30

5. Inverted siphon is made of:

a) one pipe

b) two pipes

c) three pipes

d) four pipes

6 / 30

6. Treatment of sewage of small estates and colonies is done by:

a) aerated lagoon

b) oxidation pond

c) oxidation ditch

d) all of the above

7 / 30

7. 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

8 / 30

8. The object of cowl is to:

a) give an ornamental look

b) prevent the entry of rainfall into the waste pipe

c) quickly dispel foul gases

d) prevent nest building

9 / 30

9. 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

10 / 30

10. In strainer type wells

a) the flow is radial

b) the flow is spherical

c) area of flow depends upon the size of the cavity

d) all of the above

11 / 30

11. Grade aqueducts are not allowed to run

a) one-fourth full

b) half

c) three

d) full

12 / 30

12. Garbage dumping home is:

a) places where garbage is kept

b) places where garbage is disposed

c) places where garbage is treated

d) all of the above

13 / 30

13. The per capita consumption of a locality will be more when

a) good-quality water is supplied

b) during summer months

c) distribution pressure is increased

d) all of the above

14 / 30

14. 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

15 / 30

15. 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

16 / 30

16. When more than two sewers join in a manhole:

a) their tops should be at the same level

b) their centers should be at the same level

c) their bottoms should be at the same level

d) they can be either way

17 / 30

17. Turbidity is the ability of water to

a) retain suspended solids

b) retain colloidal solids in suspension

c) detain dissolved solids.

d) scatter light

18 / 30

18. 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

19 / 30

19. Digesters are used for:

a) the sludge digestion under optimum conditions

b) the sludge digestion under normal conditions

c) the sludge digestion under extreme conditions

d) none of the above

20 / 30

20. The sewerage system originates from:

a) main sewers

b) branch sewers

c) lateral sewers

d) house sewers

21 / 30

21. Goaty water refers to...

a) odour of water

b) turbidity of water

c) colour of water

d) all of the above

22 / 30

22. A lamp hole is helpful in:

a) illuminating sewer line

b) cleaning sewer line

c) repairing

d) testing sewers

23 / 30

23. 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

24 / 30

24. A water supply system is said to be continuous when it is supplied for:

a) 6 hrs

b) 12 hrs

c) 18 hrs

d) 24 hrs

25 / 30

25. Find the BOD with the following data: initial oxygen = 9 PPM, final oxygen = 4 PPM sewage sample 200 ml and diluted sewage = 4 ppm.

a) 180 PPM

b) 320 PPM

c) 200 PPM

d) 250 PPM

26 / 30

26. The sewer pipes:

a) carry sewage as gravity conduits

b) should resist the wear and tear caused due to abrasion

c) are designed for generating self-cleaning velocities at different discharge

d) all of the above

27 / 30

27. Gravity water supply system starts from

a) intake

b) collection chamber

c) BPT

d) faucet

28 / 30

28. 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

29 / 30

29. The type of joint used in plastic pipe is

a) butt welding

b) solvent welding

c) thread joint

d) dresser coupling joint

30 / 30

30. A communicable disease is

a) cancer

b) fluorosis

c) tuberculosis

d) goitre

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Water Supply & Sanitation Engineering Online Test – Paper 2

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