Irrigation Engineering Online Test – Paper 2

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Vikash chaudhary

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Total Questions: 30
Time Allotted: 30 minutes
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1 / 30

1. A sudden fall of the level of the ground along the alignment of the canal joined by an inclined bed is called a

a) jump

b) sudden fall

c) rapid fall

d) hydraulic jump

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 most commonly adopted method of irrigation for cereal crops is

a) furrow flooding

b) border flooding

c) check flooding

d) free flooding

4 / 30

4. The weir is generally aligned at a right angle to the direction of the main river flow because

a) it gives better discharge capacity

b) less length of weir is required

c) it is economical

d) all of the above

5 / 30

5. 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

6 / 30

6. 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

7 / 30

7. The water face of the guide banks is protected by

a) one layer stone pitching

b) two-layer stone pitching

c) three-layer stone pitching

d) four-layer stone pitching

8 / 30

8. According to Lacey's theory, the depth of scour in the case of a right-angle bend is

a) 1.414D

b) 1.667D

c) 2D

d) 2.5D

9 / 30

9. 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

10 / 30

10. According to Lacey's regime theory, a channel is said to be in its regime when it satisfies the condition

a) discharge is constant

b) silt grade and silt charge are constant

c) the channel is flowing in incoherent unlimited alluvial soil of the same nature as that transported

d) all of the above

11 / 30

11. *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

12 / 30

12. The forces considered for the analysis of an elementary profile of a gravity dam under an empty reservoir condition are

a) uplift pressure

b) water pressure

c) self-weight

d) earthquake pressure

13 / 30

13. The bed of a canal is lowered in the case of

a) level crossing

b) canal siphon

c) siphon aqueduct

d) none of the above

14 / 30

14. Which of the following is not a Rabi crop?

a) potato

b) groundnut

c) wheat

d) sugarcane

15 / 30

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

a) puddling

b) seeding

c) harvesting

d) flowering

16 / 30

16. *The most efficient section of a channel is

a) triangular

b) rectangular

c) square

d) trapezoidal

17 / 30

17. *Which is the best hydraulic section of the following open channel cross-section?

a) Rectangle

b) Triangle

c) Trapezoidal

d) Semicircle

18 / 30

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

a) permanent canal

b) perennial canal

c) continuous canal

d) green canal

19 / 30

19. A hydraulic structure is designed to withstand

a) seepage

b) hydraulic jump

c) hydraulic pressure

d) all of the above

20 / 30

20. Which of the following crops are in Rabi groups?

a) groundnut

b) sugar cane

c) bajra

d) none of the above

21 / 30

21. *In a syphon aqueduct, the maximum uplift pressure on the floor occurs when

a) the canal is full

b) the canal is full and drainage is dry

c) the canal is empty and the water table in the stream rises to the canal bed

d) both canal and drainage are full

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. Waterlogging may result from

a) over-irrigation

b) inadequate drainage

c) seepage from adjoining reservoirs, etc.

d) all of the above

24 / 30

24. River on alluvial plains is usually

a) aggrading type

b) degrading type

c) meandering type

d) stable type

25 / 30

25. *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

26 / 30

26. *Groynes are provided

a) traverse to the river

b) longitudinal to the river

c) parallel to the river

d) none of the above

27 / 30

27. On a suitable foundation, the earthen dam can be constructed up to a height of

a) 50 m

b) 100 m

c) 150 m

d) 200 m

28 / 30

28. An aggrading river is

a) scouring river

b) silting river

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

d) none of the above

29 / 30

29. The types of irrigation applicable if there is a scarcity of water with high pressure

a) drip irrigation

b) trickle irrigation

c) both (a) and (b) above

d) sprinkler irrigation

30 / 30

30. 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

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Irrigation Engineering Online Test – Paper 2

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