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 water supply demand in a day school without a boarder should be

a) 10 lpcd

b) 20 lpcd

c) 30 lpcd

d) 40 lpcd

2 / 30

2. HGL should always be...... above the GL

a) 5 m

b) 10 m

c) 15 m

d) 20 m

3 / 30

3. GI pipe coming from both sides is joined with a fitting called:

a) Tee

b) Union

c) Elbow

d) Socket

4 / 30

4. 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

5 / 30

5. 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

6 / 30

6. The most suitable excreta disposal unit for human excreta is:

a) Privy pit

b) Cesspool

c) Soak pit

d) None of the above

7 / 30

7. Presence of algae in water indicates that the water is

a) hard

b) soft

c) acidic

d) pure

8 / 30

8. Flush air inlets are sometimes called:

a) ventilated lamp holes

b) well hole

c) clean outs

d) flushing tank

9 / 30

9. The fire demand of a city is generally calculated by

a) underwriters formula

b) freeman formula

c) kuichling's formula

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 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

12 / 30

12. 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

13 / 30

13. In Chezy's formula v=c√ms for calculating the velocity of flow in a circular sewer, the Chezy's constant c depends upon:

a) size of the sewer

b) shape of the sewer

c) roughness of the sewer

d) all of the above

14 / 30

14. Disinfection of water involves.....

a) killing of diseases bacteria

b) produce of diseases of water

c) no change diseases bacteria

d) none of the above

15 / 30

15. The water carriage sewage system:

a) is cheaper in initial cost than dry conveyance system

b) requires treatment before disposal

c) creates a hygienic problem

d) all of the above

16 / 30

16. The distribution mains in a water supply system are designed for

a) maximum daily demand

b) peak hourly demand

c) average daily demand

d) maximum hourly demand on the maximum consumption day

17 / 30

17. The color of septic sewage is:

a) grey

b) black

c) white

d) blue

18 / 30

18. Gravity water supply system starts from

a) intake

b) collection chamber

c) BPT

d) faucet

19 / 30

19. Fluoridation is done to

a) protect children's teeth

b) protect from dental fluorosis

c) protect from both dental and skeletal fluorosis

d) add taste to water

20 / 30

20. "A right-angled sleeve (valve) connected in the water main through which water is tapped for domestic supply is called:

a) service pipe

b) goose neck

c) ferrule

d) stop tap

21 / 30

21. The hourly variation factor is generally taken

a) 1.2

b) 1.5

c) 1.8

d) 2.3

22 / 30

22. The valve provided after the pump in the rising mains to prevent the back flow of water when the pump is stopped is

a) air relief valve

b) reflux valve

c) sluice valve

d) all of the above

23 / 30

23. Size of colloidal particles present in water is

a) 10 to 10^-1 mm

b) 10^-1 to 10^-3 mm

c) 10^-3 to 10^-6 mm

d) 10^-6 to 10^-9 mm

24 / 30

24. Sickness of tube well indicates

a) increase in well

b) reduction in yield

c) suffering from waterborne disease

d) all of the above

25 / 30

25. In distribution pipes, drain valves are provided at

a) lower point

b) higher point

c) junction points

d) anywhere

26 / 30

26. Infiltration gallery is a

a) horizontal well

b) vertical well

c) inclined well

d) none of the above

27 / 30

27. Inverted siphon is called:

a) depressed sewer

b) sag sewer

c) both of the above

d) none of the above

28 / 30

28. 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

29 / 30

29. The types of pipe which are generally laid vertically due to low strength is

a) copper

b) concrete

c) asbestos cement

d) cast iron

30 / 30

30. A good source of water requiring practically least treatment is

a) perennial river

b) impounded reservoir

c) deep well

d) elevated lake

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Water Supply & Sanitation Engineering Online Test – Paper 2

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