Irrigation Engineering Online Test - Paper 3 »Exclusive Quiz

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Vikash chaudhary

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Total Questions: 50
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1 / 50

1. A rectangular channel is said to be wide if

a) width is five times the depth of flow

b) width is five times the depth of flow

c) width is more than ten times the depth of the flow

d) none of the above

2 / 50

2. *A protective and training bank, constructed at the site of a bridge or weir to guide the river through the waterway provided in the structure, is called

a) guide bank

b) safety bank

c) earth bank

d) none of the above

3 / 50

3. A fall, which maintains its depth, is

a) a low weir fall

b) a trapezoidal notch fall

c) a rectangular notch fall

d) all of the above

4 / 50

4. Waterlogging may result from

a) over-irrigation

b) inadequate drainage

c) seepage from adjoining reservoirs, etc.

d) all of the above

5 / 50

5. *Bed bars in a canal are provided

a) to raise the supply level

b) to measure the discharge

c) to watch the general behavior of the canal

d) to control the silting

6 / 50

6. A contour canal

a) irrigates only on one side

b) is most suitable in hilly areas

c) is generally aligned parallel to the contour of the area

d) all of the above

7 / 50

7. *The difference in level between the top of a bank and full supply level in a canal is known as

a) berm

b) freeboard

c) height of the bank

d) none of the above

8 / 50

8. *Groynes are generally provided

a) attractive

b) deflective

c) repelling

d) all of the above

9 / 50

9. 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

10 / 50

10. *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

11 / 50

11. Aggrading river is characterized by

a) losing its bed

b) building up its beds

c) meandering

d) low discharge, low gradient

12 / 50

12. Percolation loss is less in the case of

a) sandy soil

b) black cotton soil

c) silty soil

d) all of the above

13 / 50

13. *The hydraulic jump is the example of

a) gradually varied flow

b) rapidly varied flow

c) spatially varied flow

d) none of the above

14 / 50

14. The silting in a channel occurs due to

a) defective outlet

b) defective head regulator

c) channel not in regime

d) all of the above

15 / 50

15. *Available moisture may be defined as the

a) moisture content at permanent wilting point

b) difference in water content of the soil between field capacity and permanent wilting point

c) maximum moisture-holding capacity

d) all of the above

16 / 50

16. The overflow of a spillway in the shape of a double or s-curve, which is convex at the top and concave at the bottom, is called

a) ogee spillway

b) s-spillway

c) oval spillway

d) zig-zag spillway

17 / 50

17. The kharif crop is sown

a) at the end of summer

b) at the end of the north-east monsoon

c) at the beginning of the south-west monsoon

d) in mid-summer

18 / 50

18. The method for training of rivers is

a) groynes

b) guide bank

c) pitched banks

d) all of the above

19 / 50

19. 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

20 / 50

20. *Weir method is used to measure

a) area

b) velocity

c) discharge

d) none of the above

21 / 50

21. *Hydrograph is the graphical representation of

a) river runoff and time

b) surface runoff and time

c) groundwater and time

d) rainfall and time

22 / 50

22. In a non-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

23 / 50

23. Vertical acceleration due to an earthquake results in

a) an increase in the effective weight of the dam

b) a decrease in the effective weight of the dam

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

d) none of the above

24 / 50

24. 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

25 / 50

25. Find the culturable command area from the following data. GCA = 400 Ha, wheat = 200 Ha, maize = 50 Ha, paddy = 100 Ha, barren land = 50 Ha

a) 200 Ha

b) 150 Ha

c) 50 Ha

d) 350 Ha

26 / 50

26. The fall is designed and constructed to satisfy the condition that

a) the velocity of approach should be minimum

b) it should be able to admit variations of water levels in the canal

c) bed, bank, and downstream position should be safe against erosion due to the excess energy of flow

d) all of the above

27 / 50

27. *Which of the following has the maximum water application efficiency?

a) surface irrigation

b) lift irrigation

c) sprinkler irrigation

d) furrow irrigation

28 / 50

28. 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

29 / 50

29. 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

30 / 50

30. If the value of sodium-absorption ratio lies between 10 to 18, it is called

a) low sodium water

b) medium sodium water

c) high sodium water

d) very high sodium water

31 / 50

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

a) Lacey

b) Kennedy

c) Chazy

d) none of the above

32 / 50

32. The most suitable section of a lined canal is

a) triangular section with a circular bottom for small canals

b) trapezoidal section with rounded corners for large canals

c) both (a) and (b) above

d) none of the above

33 / 50

33. Which of the following is a leguminous crop?

a) rice

b) potato

c) groundnut

d) hemp

34 / 50

34. *A divide wall is provided to

a) control the silt entering the canal

b) separate the under sluices from the weir proper

c) prevent river flood entering the canal

d) all of the above

35 / 50

35. According to Lacey's theory, the silt supporting eddies are generated from

a) the bottom of the channel

b) the side of the channel

c) both (a) and (b) above

d) none of the above

36 / 50

36. 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

37 / 50

37. 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

38 / 50

38. The supply passing down the parent channel is controlled by

a) head regulator

b) cross regulator

c) distributary head regulator

d) all of the above

39 / 50

39. 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

40 / 50

40. *After entering the canal, sediments are removed by the

a) silt ejector

b) silt excluder

c) silt regulator

d) none of the above

41 / 50

41. The portion of the reservoir normally not utilized is:

a) dead storage

b) useful storage

c) bank storage

d) valley storage

42 / 50

42. The amount of evaporation loss is

a) 1 to 2 percent of the water entering the canal

b) 2 to 5 percent of the water entering the canal

c) 5 to 10 percent of the water entering the canal

d) 50 to 20 percent of the water entering the canal

43 / 50

43. *Lining of an irrigation channel

a) increases the waterlogging area

b) decreases the waterlogging area

c) does not change the waterlogging area

d) none of the above

44 / 50

44. Silt is a

a) fertilizing agent

b) non-fertilizing agent

c) type of crop

d) type of rock

45 / 50

45. Find the delta for a crop if the base period and duty are 110 days and 1400 he/cumec respectively.

a) 38 cm

b) 48 cm

c) 58 cm

d) 68 cm

46 / 50

46. 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

47 / 50

47. If the top width is provided for the roadway, the resultant force for full reservoir condition will

a) shift towards the heel

b) shift towards the toe

c) remain stationary

d) none of the above

48 / 50

48. The discharge capacity of the undersluice is

a) twice the maximum discharge of the off-taking canal

b) 20% of maximum flood discharge

c) maximum winter discharge

d) greatest of all of the above

49 / 50

49. Intensity of irrigation is

a) is the percentage of culturable commanded area proposed to be irrigated annually

b) is always more than 100%

c) is the percentage that could be ideally irrigated

d) all of the above

50 / 50

50. According to Khosla's theory, the exit gradient

a) depends on d/b ratio

b) depends on b/d ratio

c) cannot exceed unity

d) can be zero

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