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. *Separation of flow occurs when

a) the pressure intensity reaches a minimum

b) the cross-section of a channel is reduced

c) the boundary layer comes to rest

d) the head is maximum

2 / 30

2. *When a canal is carried over a natural drainage, the structure provided is known as

a) siphon

b) aqueduct

c) super passage

d) syphon aqueduct

3 / 30

3. *The maximum discharge through a circular channel takes place when the depth of flow is equal to

a) 0.95 times the diameter

b) 0.8 times the diameter

c) 0.6 times the diameter

d) 0.5 times the diameter

4 / 30

4. 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

5 / 30

5. *The maximum velocity in a circular channel of diameter D occurs when the depth of flow is

a) 3.50 D

b) 0.73 D

c) 0.81 D

d) 0.90 D

6 / 30

6. Water found on the surface of the soil, which is not capable of movement either by gravity or capillary and can only be driven off by heat, is called

a) water vapour

b) moisture

c) hygroscopic water

d) none of the above

7 / 30

7. 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

8 / 30

8. The water stored in the reservoir below the minimum pool level is called

a) useful storage

b) dead storage

c) valley storage

d) none of the above

9 / 30

9. The number of dams in Bandhra irrigation may be

a) equal to

b) between 1 and 3

c) greater than 2

d) any of the above

10 / 30

10. *To avoid an interruption in the field of a siphon, the air vessel is provided

a) at the summit

b) at the inlet

c) at the outlet

d) none of the above

11 / 30

11. 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

12 / 30

12. *Weir method is used to measure

a) area

b) velocity

c) discharge

d) none of the above

13 / 30

13. *River training for depth is achieved by

a) groynes

b) dykes of leaves

c) groynes and bandalling

d) all of the above

14 / 30

14. 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

15 / 30

15. 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

16 / 30

16. *The discharge through a channel is maximum when

a) d = b/3

b) m = d/2

c) d = b

d) b = 1.5d

17 / 30

17. A river bend in alluvial soil is characterized by

a) silting on the convex side

b) scouring on the concave side

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

d) silting on the concave side and scouring on the convex side

18 / 30

18. 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

19 / 30

19. *The discharge through a channel is maximum when

a) m = d/3

b) m = b/2

c) m = d

d) m = 1.5d

20 / 30

20. Vertical drop fall is satisfactory for a drop up to

a) 0.5 m

b) 1.0 m

c) 1.5 m

d) 2.0 m

21 / 30

21. Canals taken off from ice-fed perennial rivers are known as

a) permanent canal

b) perennial canal

c) continuous canal

d) green canal

22 / 30

22. As the salinity of water increases, electrical conductivity

a) remains the same

b) none of the above

c) increases

d) decreases

23 / 30

23. *The river training work is concentrated with

a) discharge of water

b) depth of water

c) amount of sediment

d) all of the above

24 / 30

24. As the coefficient of friction increases, the velocity of water in a canal

a) increases

b) decreases

c) remains constant

d) none of the above

25 / 30

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

a) puddling

b) seeding

c) harvesting

d) flowering

26 / 30

26. Bed bars provided in a canal are made of

a) cement concrete

b) brick masonry

c) iron rod

d) both (a) and (b) above

27 / 30

27. 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

28 / 30

28. A weir constructed to divert part or all of the water from the stream into a different course is called

a) free weir

b) intake weir

c) submerged weir

d) none of the above

29 / 30

29. 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

30 / 30

30. A cross regulator is provided on the main canal at the

a) downstream of the offtake

b) upstream of the offtake

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

d) none of the above

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Irrigation Engineering Online Test – Paper 2

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