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. A sanitary sewer is expected to run:

a) full

b) half-full

c) 2/3 full

d) 90% full

2 / 30

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

a) Calcium sulphate

b) Magnesium sulphate

c) Calcium nitrate

d) Calcium bicarbonate

3 / 30

3. Self-purification of natural streams is caused due to

a) dilution

b) oxygen reduction

c) sunlight

d) all of the above

4 / 30

4. If you have to design a simple water filtration unit for a community water supply system in Biratnagar, which type of filter will you choose in general?

a) slow sand filter

b) rapid sand filter

c) trickling filter

d) pressure filter

5 / 30

5. Grit obtained in a grit chamber is used for:

a) as a manure

b) as a soil conditioner

c) as a coarse aggregate

d) as a substitute for sand

6 / 30

6. A circular gravity aqueduct is preferred because of

a) its maximum hydraulic mean depth

b) maximum area per unit of wetted perimeter

c) minimum cost of construction

d) all of the above

7 / 30

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

a) flexible joint

b) expansion joint

c) flanged joint

d) socket and spigot joint

8 / 30

8. If P is the total internal pressure, d is the diameter of the pressure conduit, and t is the thickness of the conduit, the hoop's stress is

a) d.p / 2t

b) d.p / t

c) d.t / 2p

d) d.t / p

9 / 30

9. Sterilization is the process of

a) killing of diseases bacteria

b) produce of diseases of water

c) no change diseases bacteria

d) eliminating all life

10 / 30

10. The odour of water can be determined by...

a) microscope

b) telescope

c) sonoscope

d) osmoscope

11 / 30

11. Minimum required residual head at the public tap stand is not less than

a) 15

b) 10

c) 5

d) 20

12 / 30

12. The fire demand of a city is generally calculated by

a) underwriters formula

b) freeman formula

c) kuichling's formula

d) all of the above

13 / 30

13. When the fall in elevation is greater than 60cm, the manhole provided is called:

a) lamp hole

b) flight manhole

c) drop manhole

d) fall manhole

14 / 30

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

a) chlorides

b) sulphates

c) nitrates

d) phosphates

15 / 30

15. Turbidity is measured by the

a) concentration of suspended solids collected after centrifuging

b) concentration of colloidal and suspended solids after sedimentation

c) intensity of light scattered when light is passed through

d) difference in suspended solid concentration before and after filtration

16 / 30

16. Booster pump is used for

a) water supply

b) sewage pumping

c) pressure increase

d) drinking purposes

17 / 30

17. 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

18 / 30

18. Source of water in the mountains is:

a) tube well

b) well

c) stream

d) none of the above

19 / 30

19. "Dental Caries" will be absent where the following is present

a) mottled enamel of teeth

b) itai-itai

c) methemoglobinemia

d) cancer

20 / 30

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

a) centrifugal

b) hydraulic ram

c) reciprocating

d) rotary

21 / 30

21. Per capita water demand is calculated in liters

a) per person per day

b) per person per month

c) per person per year

d) none of the above

22 / 30

22. Impetus valve/waste valve is provided in

a) hydraulic ram

b) centrifugal pump

c) rotary pump

d) all of the above

23 / 30

23. 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

24 / 30

24. Goitre is due to

a) chlorine

b) bromine

c) iodine

d) all of the above

25 / 30

25. Turbidity for domestic water is undesirable because it

a) is unaesthetic

b) causes change of taste

c) gives apparent colour

d) none of the above

26 / 30

26. If the diameter of the main pipe is taken less than the economical diameter, then

a) head loss will be high

b) cost of pipe will be less

c) cost of pumping will be more

d) all of the above

27 / 30

27. Gravity conduits are generally in the form of

a) open channels

b) conduits

c) tunnels

d) all of the above

28 / 30

28. Manhole is said to be deep if its depth is more than:

a) 1.5 m

b) 1.70 m

c) 1.9 m

d) 2.1 m

29 / 30

29. Water for domestic consumption should be:

a) colorless, odorless & tasteless

b) free from dissolved salts

c) hygienically safe

d) attractive for looks

30 / 30

30. Water horsepower of a pump is given by

a) WHQ / 75

b) WHQ / 360

c) WHQ / 220

d) WHQ / 85

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Water Supply & Sanitation Engineering Online Test – Paper 2

Please provide accurate information so we can send your Achievement Certificate by mail.

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