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. 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

2 / 30

2. *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

3 / 30

3. A divide wall is provided

a) parallel to the axis of weir and upstream of it

b) perpendicular to the axis of weir

c) at right angle to the axis of weir

d) none of the above

4 / 30

4. *Water-holding capacity of clay is

a) highest among all soils

b) minimum among all soils

c) same as silt and fine sand

d) zero

5 / 30

5. The minimum size of the stone that will remain at rest in a channel of longitudinal slope, S, and hydraulic mean depth, R, is given by

a) 4 RS

b) 7 RS

c) 11 RS

d) 14 RS

6 / 30

6. 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

7 / 30

7. In a gravity weir, the uplift pressure is resisted by

a) weight of floor

b) bending action of reinforced concrete floor

c) punching action of the floor

d) none of the above

8 / 30

8. *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

9 / 30

9. 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

10 / 30

10. Intensity of irrigation is

a) is the percentage of culturable commanded area proposed to be irrigated annually

b) is always more than 100%

c) is the percentage that could be ideally irrigated

d) all of the above

11 / 30

11. 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

12 / 30

12. The method of irrigation, in which land surrounded by natural or artificial banks is flooded, is known as

a) broad irrigation

b) natural irrigation

c) basin irrigation

d) none of the above

13 / 30

13. Tail race

a) is a channel conducting water away from a water wheel

b) has a gradient steeper than that of the canal

c) is the channel between the silt extractor and the river through which the escape water is discharged

d) all of the above

14 / 30

14. Hydrodynamic pressure due to an earthquake acts at a height of

a) 3H / 4π above the base

b) 4H / 3π above the base

c) 4H / 3π below the water surface

d) 3H / 4π below the water surface

15 / 30

15. *The main function of a diversion head works of a canal from a river is to

a) remove silt

b) control floods

c) store water

d) raise water level

16 / 30

16. As the salinity of water increases, electrical conductivity

a) remains the same

b) none of the above

c) increases

d) decreases

17 / 30

17. An artesian aquifer is one where

a) water surface under the ground is at atmospheric pressure

b) water is under pressure between two impervious strata

c) water table serves as the upper surface of the zone of saturation

d) none of the above

18 / 30

18. Guide banks for training a river at the site of a bridge or weir are called

a) safe bunds

b) guide bunds

c) side bunds

d) bell bunds

19 / 30

19. The kor depth for rice is 19 cm, and the kor period is 14 days. The outlet factor for this will be

a) 473 hectares/m³/sec

b) 637 hectares/m³/sec

c) 837 hectares/m³/sec

d) none of the above

20 / 30

20. In a gravity canal, F.S.L is always

a) at the ground level

b) below the ground level

c) a few cm above the ground level

d) 4 to 5 meters above the ground level

21 / 30

21. *Main purpose of mean water training for rivers is

a) flood control

b) to keep the channel in good shape by sufficient disposal of suspended and bed load

c) to provide sufficient depth of water in navigable channels during low water position

d) all of the above

22 / 30

22. When the base period of the crop is 100 days, the delta for the crop will be if the duty of the crop is 432 he/cumec.

a) 432 cm

b) 200 cm

c) 864 cm

d) 100 cm

23 / 30

23. In a gravity dam, the total force due to wave pressure acts at a height of (Where hw is the height of wave)

a) 0.375 hw above the still water level

b) 0.5 hw above the still water level

c) 0.66 hw above the still water level

d) 0.92 hw above the still water level

24 / 30

24. The necessity of irrigation is required due to

a) less rainfall

b) non-uniform rainfall

c) commercial crops

d) all of the above

25 / 30

25. The fall, which can be used as a meter fall, is

a) vertical drop fall

b) flumed glacis fall

c) unflumed glacis fall

d) none of the above

26 / 30

26. 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

27 / 30

27. The proportion of silt, water, and the size of silt particles carried depend upon

a) slope

b) nature of the surface soil

c) rainfall in the catchment area

d) all of the above

28 / 30

28. As compared to a gravity dam, earthen dams

a) require a sound rock foundation

b) require less skilled labour

c) require skilled labour

d) require more cost

29 / 30

29. In an ion exchange process when ions are transported from water to solid, ion-exchange media is fixed or fluidized bed, the process is termed as

a) flocculation

b) demineralization

c) ion-exchange

d) deionization

30 / 30

30. 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

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Irrigation Engineering Online Test – Paper 2

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