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. Sickness of tube well indicates

a) increase in well

b) reduction in yield

c) suffering from waterborne disease

d) all of the above

2 / 30

2. Most commonly used section in the grade aqueduct is

a) circular

b) rectangular

c) parabolic

d) all of the above

3 / 30

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

a) centrifugal

b) hydraulic ram

c) reciprocating

d) rotary

4 / 30

4. Harmful bacteria are called:

a) Parasites

b) Anaerobic bacteria

c) Aerobic bacteria

d) Pathogens

5 / 30

5. Asbestos pipes are

a) highly resistant to corrosion

b) light in weight and easy to transport

c) highly flexible to resist deflection up to 120

d) very smooth

6 / 30

6. The color of septic sewage is:

a) grey

b) black

c) white

d) blue

7 / 30

7. In order to consider temperature changes, metal pipes are usually provided with

a) expansion joints

b) contraction joints

c) anchorages

d) pressure relief valves

8 / 30

8. 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

9 / 30

9. The radius of influence of the well varies with

a) rate of pumping

b) water table

c) types of well

d) none of the above

10 / 30

10. The type of joint used in plastic pipe is

a) butt welding

b) solvent welding

c) thread joint

d) dresser coupling joint

11 / 30

11. Hydrants are used for tapping water from mains for:

a) fire extinguishing

b) street washing

c) flushing sewer lines

d) all of the above

12 / 30

12. Service connections to consumer houses are generally provided with

a) copper pipes

b) PVC pipes

c) galvanized pipes

d) cast iron pipes

13 / 30

13. The interference of the well depends upon

a) the number of wells

b) spacing between wells

c) types of wells

d) all of the above

14 / 30

14. 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

15 / 30

15. The layout of the distribution system that is suitable for haphazardly growing cities is:

a) dead-end system

b) grid iron system

c) ring system

d) radial system

16 / 30

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

a) zinc

b) lead

c) silver

d) aluminum

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 average discharge of a tube-well is about

a) 5 liters/sec

b) 50 liters/sec

c) 100 liters/sec

d) 500 liters/sec

19 / 30

19. The highest non-scouring velocity in a sewer may be allowed in:

a) cast iron sewer

b) glazed brick sewer

c) cement concrete

d) stone ware sewer

20 / 30

20. The type of joint used in HDP pipe is

a) butt welding

b) solvent welding

c) thread joint

d) dresser coupling joint

21 / 30

21. Strainer type tube wells are considered unsuitable for

a) coarse gravel

b) fine sand strata

c) clean gravels

d) all of the above

22 / 30

22. The valve provided at low points of the pipe to drain off water quickly under gravity is

a) drain valve

b) blow-off valve

c) sewer valve

d) all of the above

23 / 30

23. From the septic tank, the effluents are discharged into:

a) drainage

b) soak pit

c) sewer

d) none of the above

24 / 30

24. Designation of GI pipe is done with:

a) internal diameter

b) external diameter

c) center line

d) none of the above

25 / 30

25. 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

26 / 30

26. 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

27 / 30

27. A structure constructed to remove obstacles in the sewer is known as:

a) catch basin

b) well holes

c) clean outs

d) flushing tanks

28 / 30

28. Letache is observed in:

a) septic tank

b) sewage

c) landfill

d) none of the above

29 / 30

29. A lamp hole is helpful in:

a) illuminating sewer line

b) cleaning sewer line

c) repairing

d) testing sewers

30 / 30

30. Incrustation of well pipes can be reduced by:

a) using a screen having a larger area of opening

b) using acid-resistant material screen

c) removing the incrusted deposit

d) reducing the pumping rate

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