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. The common pipe used in house plumbing is:

a) PVC

b) HDPE

c) GI

d) CI

2 / 30

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

a) fire extinguishing

b) street washing

c) flushing sewer lines

d) all of the above

3 / 30

3. 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

4 / 30

4. 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

5 / 30

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

a) catch basin

b) well holes

c) clean outs

d) flushing tanks

6 / 30

6. A manhole of such depth that an access shaft is required in addition to the working chamber, is called.....:

a) shallow manhole

b) medium manhole

c) deep manhole

d) none of the above

7 / 30

7. 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

8 / 30

8. Manhole is said to be medium if its depth is between:

a) 0.7-0.9 m

b) 0.9-1.2 m

c) 0.9-1.3 m

d) 0.9-1.5 m

9 / 30

9. Goaty water refers to...

a) odour of water

b) turbidity of water

c) colour of water

d) all of the above

10 / 30

10. Kidney damage may be caused due to excess concentration of

a) fluorides

b) nitrates

c) chlorides

d) nitrites

11 / 30

11. The most dangerous metal for human health is

a) zinc

b) copper

c) lead

d) iron

12 / 30

12. The object of cowl is to:

a) give an ornamental look

b) prevent the entry of rainfall into the waste pipe

c) quickly dispel foul gases

d) prevent nest building

13 / 30

13. Which traps have perpendicular legs?

a) P-Trap

b) Q-Trap

c) gully trap

d) S-Trap

14 / 30

14. The minimum size of a fire hydrant is:

a) 5 cm

b) 10 cm

c) 15 cm

d) 50 cm

15 / 30

15. 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%

16 / 30

16. 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

17 / 30

17. The disinfection efficiency of chlorination

a) increases with the temperature of water

b) decreases with the temperature of water

c) not affected by temperature

d) none of the above

18 / 30

18. Sterilized water is generally used for

a) domestic

b) medical

c) public

d) all of the above

19 / 30

19. Water of zero hardness is obtained by

a) boiling

b) lime-soda process

c) base exchange process

d) none of the above

20 / 30

20. Time of concentration depends upon:

a) slope of the catchment

b) intensity of rainfall

c) nature of soil

d) all of the above

21 / 30

21. The types of sewer suitable for a separate system where discharge is uniform are:

a) egg-shaped

b) horse-shoe

c) circular

d) elliptical

22 / 30

22. A sewer, which receives the discharge of a number of house sewers, is called:

a) house sewer

b) lateral sewer

c) intercepting sewer

d) sub-main sewer

23 / 30

23. With the increase in the size of the water pipe, the permissible velocity (If discharge is constant)

a) decreases

b) increases

c) remains constant

d) none of the above

24 / 30

24. Methemoglobinemia (Blue babies) is due to

a) oxidation of hemoglobin

b) nitrates replacing oxygen in hemoglobin

c) nitrites replacing oxygen in hemoglobin

d) carbon monoxide replacing oxygen in hemoglobin

25 / 30

25. Grade aqueducts are not allowed to run

a) one-fourth full

b) half

c) three

d) full

26 / 30

26. The difference between a septic tank and an imhoff tank is that in an imhoff tank:

a) digestion takes place in a different compartment

b) it is suitable for serving a much bigger population

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

d) none of the above

27 / 30

27. Water for domestic consumption should be:

a) colorless, odorless & tasteless

b) free from dissolved salts

c) hygienically safe

d) attractive for looks

28 / 30

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

a) Calcium sulphate

b) Magnesium sulphate

c) Calcium nitrate

d) Calcium bicarbonate

29 / 30

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

a) confined

b) unconfined

c) perched

d) none of the above

30 / 30

30. A complete water supply system includes:

a) construction of intake and collection chamber

b) digging of a well for water

c) construction of a dam for a reservoir

d) the entire arrangement from source to distribution

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Water Supply & Sanitation Engineering Online Test – Paper 2

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