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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1 / 30

1. 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

2 / 30

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

a) chlorides

b) sulphates

c) nitrates

d) phosphates

3 / 30

3. The minimum height of a flushing cistern is:

a) 1 m

b) 2 m

c) 3 m

d) 5 m

4 / 30

4. Infiltration gallery is a

a) horizontal well

b) vertical well

c) inclined well

d) none of the above

5 / 30

5. The standard BOD at 20°C is taken for the consumption in:

a) 20 days

b) 15 days

c) 10 days

d) 5 days

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. Sickness of tube well indicates

a) increase in well

b) reduction in yield

c) suffering from waterborne disease

d) all of the above

8 / 30

8. The curve showing the level of water in a well and the original water table is known as

a) inverted cone of depression

b) drawdown curve

c) circle of influence

d) all of the above

9 / 30

9. Alum increases

a) hardness of water

b) carbonate of water

c) sulphate of water

d) acidity of water

10 / 30

10. Groundwater is generally free from

a) suspended impurities

b) dissolved impurities

c) both (a) and (b) of the above

d) none of the above

11 / 30

11. Gravity conduits are generally in the form of

a) open channels

b) conduits

c) tunnels

d) all of the above

12 / 30

12. As per Buston's formula, fire demand for in liters per minute for a population of p in thousands, is given by

a) 5663 √p

b) 3182 √p

c) 4640 √p

d) none of the above

13 / 30

13. A tube well of 38cm diameter has depths before and after pumping at 10.7 m and 4.60, respectively. The coefficient of permeability is 2273 liters per day. If the radius of the circle of influence is 304.8m. The yield from the tube well will be

a) 500,00 liters per day

b) 600,00 liters per day

c) 750,00 liters per day

d) 900,00 liters per day

14 / 30

14. If the diameter of a sewer is 150 mm, the gradient required for generating a self-cleaning velocity is:

a) 1 in 10

b) 1 in 100

c) 1 in 200

d) 1 in 300

15 / 30

15. 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

16 / 30

16. The inlet and outlet pipes of the septic tank are bent:

a) upward

b) downward

c) inlet upward and outlet downward

d) inlet downward and outlet upward

17 / 30

17. 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

18 / 30

18. Sewerage system is designed for:

a) maximum flow only

b) minimum flow only

c) average flow only

d) maximum and minimum flow

19 / 30

19. The sewer meant to carry excess discharge from an existing sewer is called:

a) main sewer

b) trunk sewer

c) outfall sewer

d) relief sewer

20 / 30

20. Sewer preferred for a combined system of sewage is:

a) rectangular sewer

b) circular sewer

c) egg-shaped sewer

d) all of the above

21 / 30

21. Inverted siphon is called:

a) depressed sewer

b) sag sewer

c) both of the above

d) none of the above

22 / 30

22. An egg-shaped section of sewer:

a) is economical than a circular section

b) is more stable than a circular section

c) provides self-cleansing velocity at low discharge

d) all of the above

23 / 30

23. Water demand for public use as compared to the total demand, kept in the design of waterworks for a city, is

a) 5%

b) 10%

c) 20%

d) 25%

24 / 30

24. Highly colored waters are

a) unaesthetic

b) highly polluted

c) require elaborate

d) rich in iron and manganese.

25 / 30

25. The most dangerous metal for human health is

a) zinc

b) copper

c) lead

d) iron

26 / 30

26. In distribution pipes, drain valves are provided at

a) lower point

b) higher point

c) junction points

d) anywhere

27 / 30

27. 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

28 / 30

28. Rotary pumps are suited for

a) small discharge

b) large discharge

c) high head

d) none of the above

29 / 30

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

a) tunnel

b) aqueduct

c) flume

d) conduit

30 / 30

30. Which of the following impurities in water is removed by the sedimentation process?

a) total dissolved solids

b) bacteria

c) iron and manganese

d) suspended solids

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Water Supply & Sanitation Engineering Online Test – Paper 2

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