Water Supply & Sanitation Engineering Online Test – Paper 2

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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. Most suitable section, when the maximum and minimum flow ratio is not much, is:

a) circular section

b) rectangular section

c) horse-shoe section

d) egg-shaped section

2 / 30

2. A sewer, which gets its flow from a number of transverse sewers, is known as:

a) interceptor

b) interconnector

c) head sewer

d) branch sewer

3 / 30

3. Septic tank effluent is:

a) quite clear and sparkling

b) always odorless

c) having fine organic solids with high BOD

d) black tarry liquor with an earthy odor

4 / 30

4. A perched aquifer generally occurs

a) in an aquiclude

b) in an artesian aquifer

c) above the water table

d) below the water table

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. A good source of water requiring practically least treatment is

a) perennial river

b) impounded reservoir

c) deep well

d) elevated lake

7 / 30

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

a) confined

b) unconfined

c) perched

d) none of the above

8 / 30

8. 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

9 / 30

9. The types of joint not used to resist shock, vibration, etc. is

a) dresser coupling joint

b) victaulic joint

c) flanged joint

d) flexible joint

10 / 30

10. Traddle pump is operated by

a) hand

b) foot

c) electric

d) all of the above

11 / 30

11. The shape of the trunk and outfall type of sewer is usually:

a) circular

b) rectangular type

c) horse-shoe type

d) egg-shaped type

12 / 30

12. 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

13 / 30

13. Mass action' during sedimentation is the property of:

a) decrease in mass of sludge

b) settling of a particle along with the neighboring particle

c) quick spreading of floc

d) increase in mass of sludge

14 / 30

14. A goose neck is:

a) a bent flexible pipe between ferrule and stop cock

b) a T-shaped brass between ferrule and water meter

c) a straight G.I. pipe between the service pipe and stop cock

d) a bent rigid pipe between the service pipe and water meter

15 / 30

15. The sewage consists of water:

a) 80%

b) 90%

c) 95%

d) 99.9%

16 / 30

16. What will happen if an induction motor pump is run under significantly low voltage continually?

a) Less water is pumped

b) High energy will be consumed, increasing the energy bill

c) The motor will make loud noise

d) The motor will ultimately burn-out

17 / 30

17. The sewer pipes:

a) carry sewage as gravity conduits

b) should resist the wear and tear caused due to abrasion

c) are designed for generating self-cleaning velocities at different discharge

d) all of the above

18 / 30

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

a) 1

b) 2

c) 3

d) 4

19 / 30

19. Excess concentration of magnesium salts in water causes

a) hardness

b) bitter taste

c) alkalinity

d) laxative effect

20 / 30

20. Most commonly used section in the grade aqueduct is

a) circular

b) rectangular

c) parabolic

d) all of the above

21 / 30

21. Self-purification of natural streams is caused due to

a) dilution

b) oxygen reduction

c) sunlight

d) all of the above

22 / 30

22. 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

23 / 30

23. 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

24 / 30

24. 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

25 / 30

25. The minimum size of a fire hydrant is:

a) 5 cm

b) 10 cm

c) 15 cm

d) 50 cm

26 / 30

26. For a 150mm diameter sewer, the gradient required to generate self-cleaning velocity is:

a) 1 in 10

b) 1 in 100

c) 1 in 200

d) 1 in 300

27 / 30

27. 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

28 / 30

28. As per Buston's formula, fire demand for in liters per minute for a population of p in thousands, is given by

a) 5663 √p

b) 3182 √p

c) 4640 √p

d) none of the above

29 / 30

29. Surface water is obtained from

a) well

b) spring

c) artesian well

d) rain

30 / 30

30. 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

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Water Supply & Sanitation Engineering Online Test – Paper 2

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