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. Sewer has to bear:

a) internal pressure of sewage

b) temperature stresses

c) forces due to external loads

d) all of the above

2 / 30

2. The ratio of maximum hourly consumption and average hourly consumption of the maximum day is

a) 1.2

b) 1.5

c) 1.8

d) 2.7

3 / 30

3. The ratio of maximum to average sewage flow for mains up to 1 m in diameter is usually:

a) 1.0

b) 1.2

c) 1.5

d) 2.0

4 / 30

4. The sewage in an inverted siphon will flow under what condition?

a) Air

b) Vacuum

c) Pressure

d) Gravity

5 / 30

5. The main function of a manhole is:

a) cleaning of sewer

b) inspection of sewer

c) joining different types of sewer

d) joining different grade of sewer

6 / 30

6. 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

7 / 30

7. 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

8 / 30

8. Abyssinian tube well is a special type of

a) strainer type tube well

b) cavity type tube well

c) slotted type tube well

d) perforated type tube well

9 / 30

9. Water security plan is prepared:

a) For consumptive use

b) For long-term minimization of hazards and risks

c) For quality water storage and uses for different purposes

d) For community participation

10 / 30

10. Alum increases

a) hardness of water

b) carbonate of water

c) sulphate of water

d) acidity of water

11 / 30

11. The slope of the hydraulic grade line is always towards the well due to pumping. This line of depressed water table is called

a) drawdown curve

b) circle of influence

c) dynamic gradient

d) an inverted cone of depression

12 / 30

12. Booster pump is used for

a) water supply

b) sewage pumping

c) pressure increase

d) drinking purposes

13 / 30

13. Which type of distribution system will you follow if the reduced level of the source of water is 100 m while the reduced level of the town is 50 m?

a) gravity system

b) pumping system

c) dual system

d) none of the above

14 / 30

14. Which is in the correct order?

a) house s.-Lateral s.-Branch s.-Sub-main s.-Main (Trunk)-outfall sewer

b) house s.-Lateral s.-Branch s.-Sub-main s.-Outfall s.-Main (Trunk) sewer

c) main (Trunk)-Outfall s.-House s.-Lateral s.-Branch s.-Sub-main sewer

d) lateral s.-Branch s.-Sub-main s.-Main (Trunk)-Outfall s-House sewer

15 / 30

15. The common pipe used in house plumbing is:

a) PVC

b) HDPE

c) GI

d) CI

16 / 30

16. The depression of the water table in a well due to pumping will be maximum

a) at a distance r from the well

b) at a distance r/2 from the well

c) close to the well

d) none of the above

17 / 30

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

a) Tee

b) Union

c) Elbow

d) Socket

18 / 30

18. Sickness of tube well indicates

a) increase in well

b) reduction in yield

c) suffering from waterborne disease

d) all of the above

19 / 30

19. Decrease in per capita consumption occurs by

a) use of a metering system

b) hot climate

c) good-quality water is supplied

d) all of the above

20 / 30

20. To compensate for losses, thefts, and wastage of water, an allowance made of (as per NWSC)

a) 5%

b) 10%

c) 15%

d) 35%

21 / 30

21. A 1 m cast iron pipe carries a discharge of 0.785 cum/sec, the velocity of flow will be

a) 0.9 m/sec

b) 1.0 m/sec

c) 1.2 m/sec

d) none of the above

22 / 30

22. The coverage of water supply in Nepal as per the census of 2011 is

a) 90%

b) 75%

c) 85%

d) 70%

23 / 30

23. 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

24 / 30

24. The type of joint used in joining the plain ends of cast-iron pipes is

a) flanged joint

b) flexible joint

c) dresser coupling joint

d) socket and spigot joint

25 / 30

25. A sanitary sewer is expected to run:

a) full

b) half-full

c) 2/3 full

d) 90% full

26 / 30

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

a) rectangular sewer

b) circular sewer

c) egg-shaped sewer

d) all of the above

27 / 30

27. Gravity water supply system starts from

a) intake

b) collection chamber

c) BPT

d) faucet

28 / 30

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

a) microscope

b) telescope

c) sonoscope

d) osmoscope

29 / 30

29. Widely used pipe for rural water supply in Nepal is:

a) HDPE pipes

b) GI pipes

c) PVC pipes

d) CI pipes

30 / 30

30. The maximum pressure which the pipe can withstand without any leakage during the hydrostatic pressure test is called

a) working pressure

b) test pressure

c) design pressure

d) none of the above

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