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. In water analysis, the test carried out is

a) physical

b) chemical

c) biological

d) all of the above

2 / 30

2. The most dangerous metal for human health is

a) zinc

b) copper

c) lead

d) iron

3 / 30

3. Traddle pump is operated by

a) hand

b) foot

c) electric

d) all of the above

4 / 30

4. The service pipes must be designed to carry

a) 3 times the average demand

b) 4 times the average demand

c) 1 times the average demand

d) 2 times the average demand

5 / 30

5. Before entering a manhole, a candle is lowered into the manhole:

a) to illuminate it

b) to detect toxic gases

c) to give a signal to the adjacent manhole

d) to find out the presence of oxygen

6 / 30

6. The factor for the selection of the pumping station site is

a) distance of the source of contamination or pollution

b) height above the H.F.L. of the river

c) future expansion

d) all of the above

7 / 30

7. The pipe joint commonly used in a pumping station is

a) flexible joint

b) expansion joint

c) flanged joint

d) socket and spigot joint

8 / 30

8. After incubating a 2.5% solution of a sewage sample for 5 days at 20°C, the depletion of oxygen was found to be 5 PPM. The BOD of the sewage will be recorded as:

a) 5 PPM

b) 50 PPM

c) 100 PPM

d) 200 PPM

9 / 30

9. Water horsepower of a pump is given by

a) WHQ / 75

b) WHQ / 360

c) WHQ / 220

d) WHQ / 85

10 / 30

10. For separate and partially separate systems, the pattern of collection suitable is:

a) perpendicular pattern

b) interceptor pattern

c) radial pattern

d) fan pattern

11 / 30

11. The gradient of a sewer is:

a) given in the direction of the natural slope of the ground

b) given in the opposite direction of the natural slope of the ground

c) zero

d) more than 1 in 20

12 / 30

12. Baffle wall in septic tank is:

a) Short side wall

b) Long side wall

c) Honeycomb inner wall

d) None of the above

13 / 30

13. The type of joint used in HDP pipe is

a) butt welding

b) solvent welding

c) thread joint

d) dresser coupling joint

14 / 30

14. Pressure relief valve is provided in the water main

a) to reduce the pressure

b) upstream of the sluice

c) at the low point

d) all of the above

15 / 30

15. If p is the population of a place in thousands then the fire demand of water in liters per minute, according to Kuichling formula, is given by

a) 5663 √p

b) 3182 √p

c) 4640 √p

d) none of the above

16 / 30

16. 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

17 / 30

17. Most common sources of water in hill and terai in our country are...respectively.

a) surface and ground

b) ground and surface

c) surface and surface

d) ground and ground

18 / 30

18. Priming is the process of

a) removing the trapped air from the pump

b) removing the trapped water from the pump

c) removing the debris waste from the pump

d) all of the above

19 / 30

19. Water to the consumers may be supplied from

a) rainy wells sunk to the water level

b) infiltration well dug out on the banks of rivers

c) infiltration galleries connected to a sump well

d) all of the above

20 / 30

20. Goitre is due to

a) chlorine

b) bromine

c) iodine

d) all of the above

21 / 30

21. Designation of GI pipe is done with:

a) internal diameter

b) external diameter

c) center line

d) none of the above

22 / 30

22. Imhoff tank is a:

a) one-storey sedimentation tank

b) two-storey sedimentation tank

c) three-storey sedimentation tank

d) four-storey sedimentation tank

23 / 30

23. In distribution pipes, drain valves are provided at

a) lower point

b) higher point

c) junction points

d) anywhere

24 / 30

24. The per capita consumption of a locality is affected by

a) climatic condition

b) quality of water

c) distribution pressure

d) all of the above

25 / 30

25. The characteristics of fresh and septic sewage are:

a) alkaline and acidic

b) acidic and alkaline

c) acidic and acidic

d) alkaline and alkaline

26 / 30

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

a) microscope

b) telescope

c) sonoscope

d) osmoscope

27 / 30

27. In the one-pipe system of plumbing, the number of vertical pipes is:

a) 1

b) 2

c) 3

d) 4

28 / 30

28. 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

29 / 30

29. According to the guidelines of DWSS, the maximum number of users in each stand post should be:

a) 50

b) 100

c) 150

d) 200

30 / 30

30. A water supply system is said to be continuous when it is supplied for:

a) 6 hrs

b) 12 hrs

c) 18 hrs

d) 24 hrs

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