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 dead storage in a reservoir is provided to

a) accumulate the soil trapped in the reservoir

b) mitigate the flood

c) increase the useful life period

d) all of the above

2 / 30

2. The aqueduct or super passage type of cross drainage headworks are used when

a) high flood drainage discharge is small

b) high flood drainage discharge is large and short-lived

c) high flood drainage discharge is large and continues for a long time

d) none of the above

3 / 30

3. *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

4 / 30

4. Horizontal acceleration due to an earthquake results in

a) hydrodynamic pressure

b) inertia force into the body of the dam

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

d) none of the above

5 / 30

5. *The meandering river is always

a) maximum discharge

b) average discharge

c) dominant discharge

d) none of the above

6 / 30

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

a) Rectangle

b) Triangle

c) Trapezoidal

d) Semicircle

7 / 30

7. 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

8 / 30

8. When the discharge of a well decreases by the design amount, then this type of well is called

a) damage well

b) rough well

c) less capacity well

d) sick well

9 / 30

9. 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

10 / 30

10. *Meandering of rivers is caused by

a) excessive discharge during the floods, when turbulence is developed

b) increase in width

c) heavy deposition

d) all of the above

11 / 30

11. In a chute spillway, the flow is generally:

a) laminar

b) turbulent

c) critical

d) supercritical

12 / 30

12. River on alluvial plains is usually

a) aggrading type

b) degrading type

c) meandering type

d) stable type

13 / 30

13. *In a barrage, the crest level is kept

a) low with large gates

b) high with large gates

c) high with small gates

d) low with small gates

14 / 30

14. The consumptive use of water for a crop

a) is measured in terms of depth of water on the irrigated area

b) is measured by the volume of water per unit area

c) is partly supplied by precipitation

d) all of the above

15 / 30

15. *The obstruction across the river required to raise its water level and divert the water into the canal is called

a) weir or anicut

b) divide wall

c) guide bank

d) under sluice

16 / 30

16. In a gravity dam, tailwater causes

a) decrease in principal stress

b) decrease in shear stress

c) increase in both principal and shear stress

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

17 / 30

17. 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

18 / 30

18. *River training for depth is achieved by

a) groynes

b) dykes of leaves

c) groynes and bandalling

d) all of the above

19 / 30

19. 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

20 / 30

20. A canal, constructed by the side of and generally parallel to the parent canal with a different bed slope is called

a) parallel canal

b) ditch canal

c) drain canal

d) side canal

21 / 30

21. 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

22 / 30

22. *The operation, which washes out salts from the upper zone of the soil, is called

a) reclamation

b) leaching

c) efflorescence

d) salinity

23 / 30

23. 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

24 / 30

24. *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

25 / 30

25. *Critical depth is

a) the depth corresponding to critical velocity

b) the maximum permissible depth of a channel

c) the depth corresponding to critical flow

d) any of the above

26 / 30

26. Longitudinal shallow retaining walls built near ground level for supporting the pitching on the face of earthen embankment is called

a) base wall

b) toe wall

c) wing wall

d) bottom wall

27 / 30

27. Tortuosity of a meandering river is always

a) more than one

b) equal to one

c) less than one

d) none of the above

28 / 30

28. 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

29 / 30

29. *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

30 / 30

30. 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

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Irrigation Engineering Online Test – Paper 2

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