Irrigation Engineering Online Test - Paper 3 »Exclusive Quiz

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Vikash chaudhary

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Total Questions: 50
Time Allotted: 50 minutes
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1 / 50

1. On rolling land, the method of applying water is

a) check flooding

b) free flooding

c) border flooding

d) furrow flooding

2 / 50

2. The retaining wall in continuation of abutment both upstream and downstream is called

a) flank wall

b) wing wall

c) flarred wall

d) both (a) and (b) of above

3 / 50

3. Which of the following is a leguminous crop?

a) rice

b) potato

c) groundnut

d) hemp

4 / 50

4. For a proportional outlet, the flexibility is

a) zero

b) one

c) between zero and one

d) more than one

5 / 50

5. *The dead storage in a reservoir is provided to

a) accumulate the soil trapped in the reservoir

b) mitigate the flood

c) increase the useful life period

d) all of the above

6 / 50

6. *A device provided near weirs or dams to facilitate the migration of fish upstream or downstream around the weirs is called

a) fish net

b) fish ladder

c) fish channel

d) fish pond

7 / 50

7. As per Lacey's theory, the silt factor is

a) directly proportional to average particle size

b) directly proportional to the square root of the average particle size

c) inversely proportional to average particle size

d) not related to the average particle size

8 / 50

8. *Marginal bund/leeve is an earthen dam constructed roughly

a) parallel to the river

b) perpendicular to the river

c) acute angle with the river

d) obtuse angle with the river

9 / 50

9. *Due to topography, if the space is not available, the most suitable spillway is

a) ogee spillway

b) chute spillway

c) shaft spillway

d) straight drop spillway

10 / 50

10. In a chute spillway, the flow is generally:

a) laminar

b) turbulent

c) critical

d) supercritical

11 / 50

11. Crop water is proportional to

a) evapo-transpiration

b) effective rainfall

c) seepage of water

d) all of the above

12 / 50

12. *Weed growth in a canal leads to

a) an increase in discharge

b) a decrease in silting

c) a decrease in discharge

d) an increase in the velocity of flow

13 / 50

13. Waterlogging may result from

a) over-irrigation

b) inadequate drainage

c) seepage from adjoining reservoirs, etc.

d) all of the above

14 / 50

14. In irrigation canals, drops are needed if

a) the width of the canal is less than its depth

b) the velocity of flow is less than the critical one

c) the natural slope is very steep

d) the natural slope is very smooth

15 / 50

15. *Which of the following is not a cross drainage work?

a) aqueduct

b) super passage

c) level crossing

d) drain crossing

16 / 50

16. *Surface float method is used to measure

a) area

b) velocity

c) discharge

d) none of the above

17 / 50

17. The discharge coefficient of an ogee spillway:

a) depends upon the depth of approach and upstream slope

b) depends upon downstream apron and submergence

c) both (a) and (b) of above

d) none of the above

18 / 50

18. Hydrodynamic pressure due to an earthquake acts at a height of

a) 3H / 4π above the base

b) 4H / 3π above the base

c) 4H / 3π below the water surface

d) 3H / 4π below the water surface

19 / 50

19. The water utilized by plants is available in soils mainly in the form of

a) capillary water

b) gravity water

c) hygroscopic water

d) pore water

20 / 50

20. The numerical value of the base period is

a) less than the crop period

b) more than the crop period

c) equal to the crop period

d) all of the above

21 / 50

21. The fall, with the crest usually at or near the bed level, without a glacis, is called

a) rapid fall

b) notch fall

c) natural fall

d) regulated fall

22 / 50

22. A counter berm is

a) a horizontal benching provided on the outer slope

b) a vertical benching provided on the outer edge of the bank

c) a horizontal benching provided on the inside slope

d) a vertical benching provided on the inner edge of the bank

23 / 50

23. The formula V=0.55 mD0.64 is given by

a) Lacey

b) Kennedy

c) Chazy

d) none of the above

24 / 50

24. The width of a "Dowels" is generally kept between 32 to 60 cm, and the height above the road level should be more than

a) 10 cm

b) 20 cm

c) 30 cm

d) 40 cm

25 / 50

25. *A groyne

a) widens a river channel to improve its depth

b) deteriorates the river banks

c) silts up the area in the vicinity by creating a slack flow

d) none of the above

26 / 50

26. The name of the structure that destroys the energy is called

a) stilling basin

b) reservoir

c) head regulator

d) all of the above

27 / 50

27. *Weir method is used to measure

a) area

b) velocity

c) discharge

d) none of the above

28 / 50

28. *In a stone masonry-lined canal, the permissible velocity of water is

a) 1 m/sec

b) 2 m/sec

c) 3 m/sec

d) 4 m/sec

29 / 50

29. *Economic height of a dam is

a) very low

b) very high

c) corresponds to the minimum cost of a dam per unit of storage

d) none of the above

30 / 50

30. For any crop, the base period is measured in

a) days

b) weeks

c) months

d) years

31 / 50

31. Tortuosity of a meandering river is the ratio of

a) meander length and meander belt

b) curved length along the channel to the direct axial length of the river reach

c) direct axial length of the river reach to the curved length of the channel

d) meander belt to meander length

32 / 50

32. For the upstream face of an earthen dam, the most adverse condition for the stability of slope is

a) steady seepage

b) sudden draw down

c) sloughing of slope

d) none of the above

33 / 50

33. SHAFT spillway is the same as

a) conduit spillway

b) tunnel spillway

c) morning glory spillway

d) trough spillway

34 / 50

34. An artesian aquifer is one where

a) water surface under the ground is at atmospheric pressure

b) water is under pressure between two impervious strata

c) water table serves as the upper surface of the zone of saturation

d) none of the above

35 / 50

35. *A deep well

a) is always deeper than a shallow well

b) has more discharge than a shallow well

c) is structurally weaker than a shallow well

d) both A and B above

36 / 50

36. Necessity of cross-drainage works arises when

a) canal is aligned on the watershed across a number of drainages

b) canals are aligned away from the watershed because the area of the watershed is less suitable than other areas

c) a number of canal systems have to be linked

d) all of the above

37 / 50

37. *The river training work is concentrated with

a) discharge of water

b) depth of water

c) amount of sediment

d) all of the above

38 / 50

38. Roughness of the bed and sides of a channel can be reduced by

a) removing sandbars

b) removing fallen trees and other snags

c) preventing cropping on the river bed near banks

d) all of the above

39 / 50

39. The uplift pressure acting on a dam is controlled by

a) pressure grouting in the foundation

b) constructing drainage channels between the dam and its foundation

c) constructing a cutoff under the upstream face

d) all of the above

40 / 50

40. 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

41 / 50

41. If there are two canals taking off from each bank of a river, then there will be

a) one divide wall and one under sluice

b) one divide wall and two under sluice

c) two divide walls and one under sluice

d) two divide walls and two under sluice

42 / 50

42. In a gravity dam, the main overturning force is

a) self-weight of the dam

b) wind pressure

c) water pressure

d) uplift pressure

43 / 50

43. *The maximum amount of water required in the case of paddy is at the time of

a) puddling

b) seeding

c) harvesting

d) flowering

44 / 50

44. *The operation, which washes out salts from the upper zone of the soil, is called

a) reclamation

b) leaching

c) efflorescence

d) salinity

45 / 50

45. The maximum quantity of water that can be supplied from the reservoir with full guarantee during the worst dry period is known as

a) safe yield

b) design yield

c) secondary yield

d) average yield

46 / 50

46. A minimum of 90 cm freeboard is provided if the discharge in the canal is

a) between 10 and 30 cumecs

b) between 30 and 60 cumecs

c) over 60 cumecs

d) over 100 cumecs

47 / 50

47. Tail race

a) is a channel conducting water away from a water wheel

b) has a gradient steeper than that of the canal

c) is the channel between the silt extractor and the river through which the escape water is discharged

d) all of the above

48 / 50

48. *For no tension to develop at the base of a gravity dam, the maximum permissible eccentricity is

a) B/6

b) B/3

c) B/2

d) all of the above

49 / 50

49. Bed bars provided in a canal are made of

a) cement concrete

b) brick masonry

c) iron rod

d) both (a) and (b) above

50 / 50

50. Pitot tube is used to measure

a) area

b) velocity

c) discharge

d) none of the above

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