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. An impervious wall inside an earthen dam to reduce seepage is known as

a) core wall

b) diaphragm wall

c) pug wall

d) all of the above

2 / 30

2. 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

3 / 30

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

a) check flooding

b) free flooding

c) border flooding

d) furrow flooding

4 / 30

4. *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

5 / 30

5. 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

6 / 30

6. *Surface float method is used to measure

a) area

b) velocity

c) discharge

d) none of the above

7 / 30

7. The overflow portion of dam, over which surplus discharge flows from the reservoir to the downstream is known as:

a) spillway

b) dam

c) groyne

d) channel

8 / 30

8. Silt is a

a) fertilizing agent

b) non-fertilizing agent

c) type of crop

d) type of rock

9 / 30

9. If the RLs of canal bed level and high flood level of drainage are 210.0 m and 212.0 m respectively, then the cross drainage work will be

a) aqueduct

b) super passage

c) syphon aqueduct

d) none of the above

10 / 30

10. The irrigation with sewage from a town, instead of natural water, is called

a) effluent irrigation

b) fertility irrigation

c) oxidation irrigation

d) none of the above

11 / 30

11. The velocity at which eddies in the flow die out is called

a) critical velocity

b) lower critical velocity

c) higher critical velocity

d) none of the above

12 / 30

12. *Weir method is used to measure

a) area

b) velocity

c) discharge

d) none of the above

13 / 30

13. The proportion of silt per unit volume by weight in water is called

a) silt density

b) silt charge

c) silt factor

d) none of the above

14 / 30

14. In rice, the depth of the root zone is generally,

a) 30 cm

b) 60 cm

c) 90 cm

d) 120 cm

15 / 30

15. A low gravity dam is the one in which

a) the height of the water stored is less than 30 m

b) the resultant just passes through the downstream middle third point

c) the maximum principal stress is less than the allowable crushing strength and the upstream face is vertical

d) the height of the dam is less than 5 times the top width

16 / 30

16. Aggrading river is characterized by

a) losing its bed

b) building up its beds

c) meandering

d) low discharge, low gradient

17 / 30

17. *In a concrete-lined canal, the permissible velocity of water is

a) 1 m/sec

b) 2 m/sec

c) 3 m/sec

d) 4 m/sec

18 / 30

18. 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

19 / 30

19. *A silt regulator located at the head of a channel is called

a) silt ejector

b) silt excluder

c) silt sweeper

d) silt washer

20 / 30

20. A counterbalance 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

21 / 30

21. Cross walls provided across the stream, built under the floor of a hydraulic structure at the upstream and downstream ends of the pavement to avoid scour and protect floors, abutments etc., and which is carried up to another, is called

a) back walls

b) curtain wall

c) flarred wall

d) parapet wall

22 / 30

22. *A river training work is generally required when the river is

a) aggrading type

b) degrading type

c) meandering type

d) stable type

23 / 30

23. A straight or curved retaining wall with its profile gradually changing from one slope to another is called

a) curtain wall

b) back wall

c) flarred wall

d) parapet wall

24 / 30

24. The type of fall suitable for any discharge is

a) vertical type

b) straight glacis fall with baffle wall

c) straight glacis fall without a baffle wall

d) all of the above

25 / 30

25. River on alluvial plains is usually

a) aggrading type

b) degrading type

c) meandering type

d) stable type

26 / 30

26. Tortuosity of a meandering river is always

a) more than one

b) equal to one

c) less than one

d) none of the above

27 / 30

27. *River training for depth is achieved by

a) groynes

b) dykes of leaves

c) groynes and bandalling

d) all of the above

28 / 30

28. For irrigation purposes, the pH value of water should be

a) between 3 and 6

b) between 6 and 8.5

c) between 8.5 and 11

d) more than 11

29 / 30

29. 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

30 / 30

30. 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

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Irrigation Engineering Online Test – Paper 2

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