Irrigation 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%
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1 / 30

1. The most suitable location of a canal headwork is

a) boulders stage of the river

b) delta stage of the river

c) rock stage of the river

d) trough stage of the river

2 / 30

2. Silt excluders are constructed on the

a) river bed down stream of the head regulator

b) river bed up stream of the head regulator

c) canal bed up stream of the head regulator

d) canal bed down stream of the head regulator

3 / 30

3. For syphon aqueducts, the highest flood level of the drain is

a) much above the canal bed

b) much below the canal trough

c) at the level of the canal bed

d) none of the above

4 / 30

4. Salt present in water, harmful for cultivation purposes, is

a) sodium carbonate

b) potassium sulfate

c) calcium sulfate

d) none of the above

5 / 30

5. *Depth of canal cross-section such that the quantity of excavation is equal to the earthwork required for banks is known as

a) balancing depth

b) canal depth

c) water depth

d) none of the above

6 / 30

6. *River training for depth is achieved by

a) groynes

b) dykes of leaves

c) groynes and bandalling

d) all of the above

7 / 30

7. In waterlogged lands

a) the soil pores are within a depth of 1 meter

b) the soil pores are saturated up to the root zone of the crop

c) the soil pores are saturated up to the depth of 40cm

d) the soil pores are saturated up to the top

8 / 30

8. A most economical section is one for which a given cross-sectional area, slope of bed, and coefficient of resistance has

a) maximum wetted perimeter

b) maximum discharge

c) maximum depth of flow

d) minimum depth of flow

9 / 30

9. *Attracting type spurs

a) pointing up stream

b) pointing down stream

c) parallel to bank

d) perpendicular to bank

10 / 30

10. As compared to the crest of the normal portion of the weir, the crest of the undersluice portion of the weir is kept at

a) higher level

b) same level

c) lower level

d) all of the above

11 / 30

11. Pitot tube is used to measure

a) area

b) velocity

c) discharge

d) none of the above

12 / 30

12. The necessity of irrigation is required due to

a) less rainfall

b) non-uniform rainfall

c) commercial crops

d) all of the above

13 / 30

13. The fertility of the soil is adversely affected when the pH value is more than

a) 7

b) 9

c) 11

d) 14

14 / 30

14. *Meandering of the river increases the length of the river while cut-off

a) increase in the width of the river

b) decrease the length of the river

c) increase the length of the river

d) decrease the width of the river

15 / 30

15. *The discharge through a channel is maximum when

a) m = d/3

b) m = b/2

c) m = d

d) m = 1.5d

16 / 30

16. A canal, designed to irrigate throughout the year, is

a) permanent canal

b) perennial canal

c) continuous canal

d) green canal

17 / 30

17. *Borrow pits are preferably located in the field

a) on both sides of the canal

b) in the central half section of the canal

c) on the left side of the canal

d) on the right side of the canal

18 / 30

18. The average delta of a rice crop is nearly

a) 30 cm

b) 60 cm

c) 120 cm

d) 150 cm

19 / 30

19. Lands or climate that lack sufficient water for agriculture without artificial irrigation are called

a) dry zone

b) arid zone

c) semi-arid zone

d) hybrid arid zone

20 / 30

20. *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

21 / 30

21. *The river training work is concentrated with

a) discharge of water

b) depth of water

c) amount of sediment

d) all of the above

22 / 30

22. 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°

23 / 30

23. *When the water table is within the root zone depth and is detrimental to plant life, the land is said to be

a) over nourished

b) super-saturated

c) waterlogged

d) undernourished

24 / 30

24. An excavation in the base of a dam or other structures filled with relatively impervious material to reduce percolation is called

a) cut-off trench

b) key trench

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

d) none of the above

25 / 30

25. In a syphon spillway, the effective head is measured

a) as the difference in levels of water upstream and downstream of the spillway

b) as the difference in levels between the headwater and the average ground level

c) as the height of the crest above ground

d) none of the above

26 / 30

26. The method for training of rivers is

a) groynes

b) guide bank

c) pitched banks

d) all of the above

27 / 30

27. *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

28 / 30

28. Optimum depth of kor watering for wheat in the plains or terai is

a) 13.5 cm

b) 16.5 cm

c) 19 cm

d) 21 cm

29 / 30

29. The upstream face of an earthen dam is

a) a flow line

b) a phreatic line

c) a cubic parabola

d) none of the above

30 / 30

30. 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

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Irrigation Engineering Online Test – Paper 2

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