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

a) expansion joints

b) contraction joints

c) anchorages

d) pressure relief valves

2 / 30

2. The maximum diameter of a sewer pipe should preferably be:

a) 100 cm

b) 200 cm

c) 300 cm

d) 450 cm

3 / 30

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

a) drainage

b) soak pit

c) sewer

d) none of the above

4 / 30

4. Turbidity is the ability of water to

a) retain suspended solids

b) retain colloidal solids in suspension

c) detain dissolved solids.

d) scatter light

5 / 30

5. Ovoid sewers are best suited for:

a) separate system

b) combined system with less fluctuations

c) combined system with very wide fluctuations

d) outfall sewer

6 / 30

6. The open channels supported above the ground over trestles are called

a) tunnel

b) aqueduct

c) flume

d) conduit

7 / 30

7. 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

8 / 30

8. Purest water may have

a) no colour

b) faint blue-green colour

c) dark blue colour

d) brownish-yellow colour

9 / 30

9. Velocity of flow through a grit chamber is:

a) 30 to 60 cm/sec

b) 30 to 60 cm/min

c) 15 to 45 cm/sec

d) 15 to 45 cm/min

10 / 30

10. Service connections to consumer houses are generally provided with

a) copper pipes

b) PVC pipes

c) galvanized pipes

d) cast iron pipes

11 / 30

11. The bacteria which can survive with or without oxygen is known as...

a) aerobic bacteria

b) anaerobic bacteria

c) facultative bacteria

d) none of the above

12 / 30

12. The specific gravity of sewage is:

a) equal to 1

b) slightly less than 1

c) slightly more than 1

d) none of the above

13 / 30

13. Inverted siphon is called:

a) special sewer

b) general sewer

c) storm sewer

d) none of the above

14 / 30

14. A goose neck is:

a) a bent flexible pipe between ferrule and stop cock

b) a T-shaped brass between ferrule and water meter

c) a straight G.I. pipe between the service pipe and stop cock

d) a bent rigid pipe between the service pipe and water meter

15 / 30

15. 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

16 / 30

16. Sewer has to bear:

a) internal pressure of sewage

b) temperature stresses

c) forces due to external loads

d) all of the above

17 / 30

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

a) 15

b) 10

c) 5

d) 20

18 / 30

18. The quantity of flushing water required for pour-flush water seal latrine is:

a) 0.5-1.5 litres

b) 1.5-2.0 litres

c) 2.0-3.0 litres

d) 3.0-4.0 litres

19 / 30

19. Where it is not possible to obtain self-cleansing velocities for sewers, flush are provided with the minimum available head of:

a) 1-3 m

b) 3-5 m

c) 5-7 m

d) 7-10 m

20 / 30

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

a) microscope

b) telescope

c) sonoscope

d) osmoscope

21 / 30

21. Growth of the population can be conveniently represented by

a) arithmetical curve

b) geographical curve

c) logistic curve

d) straight line curve

22 / 30

22. 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

23 / 30

23. Following material is used during drilling to prevent caving

a) bentonite

b) thixotropy

c) both (a) and (b) above

d) none of the above

24 / 30

24. In the partially ventilated single-stack system of plumbing, the number of vertical pipes is:

a) 1

b) 2

c) 3

d) 4

25 / 30

25. Asbestos pipes are joined by means of

a) flanged joint

b) flexible joint

c) simplex joint

d) dresser coupling joint

26 / 30

26. At the socket and spigot joint,

a) the enlarged end of the pipe is called a socket

b) the normal end of the pipe is called a spigot

c) the spigot is fitted into the socket

d) all of the above

27 / 30

27. The maximum amount of copper in domestic water should be

a) up to 3 ppm

b) up to 15 ppm

c) up to 45 ppm

d) all of the above

28 / 30

28. The aquifer having the least water-bearing capacity is

a) confined

b) unconfined

c) perched

d) none of the above

29 / 30

29. The common pipe used in house plumbing is:

a) PVC

b) HDPE

c) GI

d) CI

30 / 30

30. 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

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Water Supply & Sanitation Engineering Online Test – Paper 2

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