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. Depth of shallow tube well shall not be more than (considering economic point):

a) 30 m

b) 40 m

c) 50 m

d) 60 m

2 / 30

2. The quantity of flushing water required for pour-flush water seal latrine is:

a) 0.5-1.5 litres

b) 1.5-2.0 litres

c) 2.0-3.0 litres

d) 3.0-4.0 litres

3 / 30

3. The SODIS method of water purification is a process of:

a) Chlorination

b) Solar disinfection

c) System of disinfected integral supply

d) Supply of disinfected and improved water system

4 / 30

4. Harmful bacteria are called:

a) Parasites

b) Anaerobic bacteria

c) Aerobic bacteria

d) Pathogens

5 / 30

5. 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

6 / 30

6. The most commonly used coagulant is:

a) Alum

b) Lime

c) Chlorine

d) Bleaching powder

7 / 30

7. The relation between porosity, specific yield, and specific retention is given by

a) porosity = specific yield + specific retention

b) porosity = specific yield - specific retention

c) specific yield = porosity + specific retention

d) none of the above

8 / 30

8. Dengue is termed as which type of disease?

a) Waterborne

b) Water washed

c) Water based

d) Water related

9 / 30

9. Two sewer sections laid at the same grade will be hydraulically equivalent if:

a) their discharge capacity when running full is equal

b) their flow velocity when running full is equal

c) their flowing areas when running full are equal

d) all the above factors are equal

10 / 30

10. Septic tank is provided for:

a) To eliminate the sewer system

b) Tank for sedimentation cum disposal under aerobic conditions

c) Oxygen-free sedimentation cum disposal under anaerobic conditions

d) None of the above

11 / 30

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

a) microscope

b) telescope

c) sonoscope

d) osmoscope

12 / 30

12. Turbidity is undesirable because it

a) renders waters unpalatable

b) affects photosynthesis of aquatic life

c) causes milky unite coloration to water

d) causes red and brown stains

13 / 30

13. The water collected for the sample from the

a) 10-20 cm below from the surface

b) 20-30 cm below from the surface

c) 30-40 cm below from the surface

d) 40-50 cm below from the surface

14 / 30

14. 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

15 / 30

15. In water analysis, the test carried out is

a) physical

b) chemical

c) biological

d) all of the above

16 / 30

16. The clarigesters are:

a) circular septic tanks

b) circular imhoff double storage tanks without bottom hoppers

c) rectangular septic tanks

d) none of the above

17 / 30

17. As compared to cast iron pipes, steel pipes are

a) stronger

b) heavier

c) costlier

d) all of the above

18 / 30

18. Excess concentration of magnesium salts in water causes

a) hardness

b) bitter taste

c) alkalinity

d) laxative effect

19 / 30

19. The water supply demand in a fully plumbed system in Nepal context

a) 45 lpcd

b) 65 lpcd

c) 112 lpcd

d) 135 lpcd

20 / 30

20. The valve provided on the suction pipe in a tube-well is

a) air relief valve

b) reflux valve

c) pressure

d) sluice valve

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. Flush air inlets are sometimes called:

a) ventilated lamp holes

b) well hole

c) clean outs

d) flushing tank

23 / 30

23. Depth of shallow tube well shall not be more than (considering economic point)

a) 30 m

b) 40 m

c) 50 m

d) 60 m

24 / 30

24. Total quantity of reservoir is the sum of the following

a) breakdown reserve

b) fire reserve

c) all of the above

d) balancing reserve

25 / 30

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

a) perennial river

b) impounded reservoir

c) deep well

d) elevated lake

26 / 30

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

a) 5 m

b) 10 m

c) 15 m

d) 20 m

27 / 30

27. Manhole is said to be shallow if its depth is less than:

a) 0.7-0.9 m

b) 1.0-1.2 m

c) 0.8 m

d) 0.7 m

28 / 30

28. Inverted siphon is called:

a) depressed sewer

b) sag sewer

c) both of the above

d) none of the above

29 / 30

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

a) chlorides

b) sulphates

c) nitrates

d) phosphates

30 / 30

30. A circular gravity aqueduct is preferred because of

a) its maximum hydraulic mean depth

b) maximum area per unit of wetted perimeter

c) minimum cost of construction

d) all of the above

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Water Supply & Sanitation Engineering Online Test – Paper 2

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