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. Letache is observed in:

a) septic tank

b) sewage

c) landfill

d) none of the above

2 / 30

2. A perched aquifer generally occurs

a) in an aquiclude

b) in an artesian aquifer

c) above the water table

d) below the water table

3 / 30

3. The type of joint used in plastic pipe is

a) butt welding

b) solvent welding

c) thread joint

d) dresser coupling joint

4 / 30

4. The minimum water flow in a tap stand is:

a) 0.25 lps

b) 0.20 lps

c) 0.15 lps

d) 0.10 lps

5 / 30

5. Advantage of pressure conduits is

a) flow is independent of the grade of the hydraulic grade line

b) economical since it follows a shorter path

c) less chance of water pollution as it is closed

d) all of the above

6 / 30

6. Which device warns that the liquid is above the pump level?

a) High-level alarm

b) Check valve

c) Union

d) Pump lift chain

7 / 30

7. Shrouding is the process of filling gravel, bajri, etc., in

a) slotted tube well

b) strainer tube well

c) perforated tube well

d) cavity tube well

8 / 30

8. It is practical to design sewer for the self-cleaning velocity at:

a) Ultimate peak flow

b) Maximum flow

c) Minimum flow

d) Extra flow

9 / 30

9. Anti-siphonage pipe is connected to:

a) Top of PWC

b) Bottom of PWC

c) In the main pipe

d) None of the above

10 / 30

10. A G.I. pipe has a coating of

a) zinc

b) lead

c) silver

d) aluminum

11 / 30

11. 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

12 / 30

12. The sewage consists of water:

a) 80%

b) 90%

c) 95%

d) 99.9%

13 / 30

13. 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

14 / 30

14. Pressure relief valve is provided in the water main

a) to reduce the pressure

b) upstream of the sluice

c) at the low point

d) all of the above

15 / 30

15. Sewer which gets discharge from two or more main sewers is called:

a) main sewer

b) trunk sewer

c) combined sewer

d) intercepting sewer

16 / 30

16. 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

17 / 30

17. Abbreviation which is correct?

a) TOC (Total Organic Carbon)

b) ThOD (Theoretical Oxygen Demand)

c) TOD (Total Oxygen Demand)

d) all of the above

18 / 30

18. The gradient to be provided for sewers depends upon:

a) the diameter of the sewer

b) the discharge

c) sewer pipe material

d) all of the above

19 / 30

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

a) microscope

b) telescope

c) sonoscope

d) osmoscope

20 / 30

20. Which is in the correct order?

a) house s.-Lateral s.-Branch s.-Sub-main s.-Main (Trunk)-outfall sewer

b) house s.-Lateral s.-Branch s.-Sub-main s.-Outfall s.-Main (Trunk) sewer

c) main (Trunk)-Outfall s.-House s.-Lateral s.-Branch s.-Sub-main sewer

d) lateral s.-Branch s.-Sub-main s.-Main (Trunk)-Outfall s-House sewer

21 / 30

21. A sewer that collects sewage from toilets is called:

a) lateral sewer

b) branch sewer

c) main sewer

d) outfall sewer

22 / 30

22. The types of diseases caused due to the lack of water are known as

a) waterborne

b) water-washed

c) water-based

d) water vector

23 / 30

23. 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

24 / 30

24. "Puits developee" is generally provided in case of

a) well

b) tube well

c) reservoir

d) none of the above

25 / 30

25. The ratio of maximum hourly consumption and average hourly consumption of the maximum day is

a) 1.2

b) 1.5

c) 1.8

d) 2.7

26 / 30

26. The type of joint generally used in cast-iron pipes is

a) flanged joint

b) socket and spigot joint

c) dresser coupling joint

d) all of the above

27 / 30

27. The location of a well is considered good if it is sunk into

a) coarse gravel

b) silt

c) sand

d) clay

28 / 30

28. 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

29 / 30

29. Computation of discharges is difficult for:

a) dead-end system

b) grid iron system

c) ring system

d) radial system

30 / 30

30. Tuberculation is caused in a metal pipe due to

a) sulphur-reducing bacteria

b) nitrogen-reducing bacteria

c) oxygen-reducing bacteria

d) phosphorus of total water demand

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