Irrigation Engineering Online Test - Paper 2

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Total Questions: 30
Time Allotted: 30 minutes
Passing Score: 50%
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1 / 30

1. In an earthen dam, seepage through the foundation is controlled by providing

a) impervious cut off

b) none of the above

c) chimney drain

d) horizontal blanket

2 / 30

2. Siltation of a reservoir can be reduced by

a) land management

b) providing sluice gates at different levels

c) providing gully plugging check dams and contour bunds in the catchment area

d) all of the above

3 / 30

3. The minimum size of the stone that will remain at rest in a channel of longitudinal slope, S, and hydraulic mean depth, R, is given by

a) 4 RS

b) 7 RS

c) 11 RS

d) 14 RS

4 / 30

4. The discharge coefficient of an ogee spillway is:

a) 1.2

b) 1.8

c) 2.02

d) 3.7

5 / 30

5. The angle between the head regulator and the water, for smooth entry of water into a canal, is generally kept at

a) 60°

b) 90°

c) 100°

d) 110°

6 / 30

6. *The hydraulic jump is known as

a) standing wave

b) positive surge

c) negative wave

d) none of the above

7 / 30

7. The necessity of irrigation is required due to

a) less rainfall

b) non-uniform rainfall

c) commercial crops

d) all of the above

8 / 30

8. Canals taking off from a river with or without a head regulator are called

a) feeder canal

b) inundation canal

c) ditch canal

d) contour canal

9 / 30

9. *The process by which unculturable soil made culturable is known as

a) reclamation

b) leaching

c) efflorescence

d) salinity

10 / 30

10. In an ion exchange process when ions are transported from water to solid, ion-exchange media is fixed or fluidized bed, the process is termed as

a) flocculation

b) demineralization

c) ion-exchange

d) deionization

11 / 30

11. For an earthen dam, least suited spillway is:

a) ogee spillway

b) chute spillway

c) shaft spillway

d) none of the above

12 / 30

12. With respect to inlet and outlet, which one is correct?

a) When cross drainage flow is small, an inlet is constructed

b) When canal flow is small, an outlet is constructed

c) The number of outlets may be equal to the number of inlets

d) All of the above

13 / 30

13. Area velocity method is used to measure.

a) area

b) velocity

c) discharge

d) none of the above

14 / 30

14. *Single bank canal is the other name for

a) ridge canal

b) contour canal

c) side slope canal

d) none of the above

15 / 30

15. Boulder lining is useful where

a) the groundwater level is above the bed of the canal

b) prevention of erosion is required

c) both (a) and (b) above

d) none of the above

16 / 30

16. *Critical depth is

a) the depth corresponding to critical velocity

b) the maximum permissible depth of a channel

c) the depth corresponding to critical flow

d) any of the above

17 / 30

17. Critical flow is

a) in which the total energy head is minimum for a given discharge

b) in which the Froude number is less than unity

c) in which the Froude number is more than unity

d) none of the above

18 / 30

18. A canal normally used for the diversion of floodwaters of a river is

a) feeder canal

b) inundation canal

c) ridge canal

d) contour canal

19 / 30

19. Whenever an embankment has to be built on unreliable soil, provision is made for

a) sand core

b) percolation

c) clay puddle

d) all of the above

20 / 30

20. The methods used for drilling a tube well in compacted rock materials is

a) wash boring

b) percussion method

c) hydraulic rotary

d) all of the above

21 / 30

21. *If the irrigation canal and drain are at the same level, the cross drainage work is achieved by providing

a) a level crossing

b) an inlet and outlet

c) siphon aqueduct

d) both (a) and (b) above

22 / 30

22. Percolation loss is less in the case of

a) sandy soil

b) black cotton soil

c) silty soil

d) all of the above

23 / 30

23. Crop water is proportional to

a) evapo-transpiration

b) effective rainfall

c) seepage of water

d) all of the above

24 / 30

24. In a gravity weir, the uplift pressure is resisted by

a) weight of floor

b) bending action of reinforced concrete floor

c) punching action of the floor

d) none of the above

25 / 30

25. The ratio of the total volume of water delivered to a crop to the area on which it has been spread is called

a) duty

b) delta

c) critical depth

d) none of the above

26 / 30

26. *A diversion head work is constructed to

a) raise the water level at the head of the canal

b) regulate the intake of water into the canal

c) reduce fluctuations in the supply level of the river

d) all of the above

27 / 30

27. Boron concentration in water for irrigation should be limited to

a) 2 ppm

b) 20 ppm

c) 200 ppm

d) 500 ppm

28 / 30

28. The type of irrigation during a low quantity of water

a) sprinkler irrigation

b) drip irrigation

c) free flooding

d) furrow method

29 / 30

29. A canal which is aligned at right angles to the contour is called

a) contour canal

b) branch canal

c) side slope canal

d) none of the above

30 / 30

30. *Mean velocity of the canal should never be

a) less than the critical velocity

b) more than the critical velocity

c) equal to the critical velocity

d) none of the above

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Irrigation Engineering Online Test – Paper 2

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