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. Gibb's module is a type of

a) non-modular outlet

b) semi-modular outlet

c) rigid-modular outlet

d) open flume outlet

2 / 30

2. *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

3 / 30

3. 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

4 / 30

4. 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

5 / 30

5. Siltation of a reservoir can be reduced by

a) land management

b) providing sluice gates at different levels

c) providing gully plugging check dams and contour bunds in the catchment area

d) all of the above

6 / 30

6. *The major resisting force in a gravity dam is

a) uplift pressure

b) water pressure

c) self-weight

d) wave pressure

7 / 30

7. The formula V=0.55 mD0.64 is given by

a) Lacey

b) Kennedy

c) Chazy

d) none of the above

8 / 30

8. The crest level of an emergency spillway is kept as

a) the same level as the main spillway

b) slightly below the crest level of the main spillway

c) at the full reservoir level

d) slightly above the crest level of the main spillway

9 / 30

9. With respect to inlet and outlet, which one is correct?

a) When cross drainage flow is small, an inlet is constructed

b) When canal flow is small, an outlet is constructed

c) The number of outlets may be equal to the number of inlets

d) All of the above

10 / 30

10. The useful storage is the volume of water stored in the reservoir between:

a) minimum pool level and maximum pool level

b) minimum pool level and normal pool level

c) normal pool level and maximum pool level

d) none of the above

11 / 30

11. *In a stone masonry-lined canal, the permissible velocity of water is

a) 1 m/sec

b) 2 m/sec

c) 3 m/sec

d) 4 m/sec

12 / 30

12. 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

13 / 30

13. 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

14 / 30

14. *The consumptive use of water for a crop

a) is measured as the volume of water per unit area

b) is measured as the depth of water on the irrigated area

c) may be supplied partly by precipitation and partly by irrigation

d) all of the above

15 / 30

15. A multipurpose reservoir is

a) planned and constructed to serve various purposes

b) designed for one purpose but serves more purposes

c) both (a) and (b)

d) none of the above

16 / 30

16. The most suitable material for the central impervious core of a zoned embankment type dam is

a) coarse sand

b) compacted soil

c) clay

d) clay mixed with fine sand

17 / 30

17. In a reservoir, which type of storage is normally used?

a) useful storage

b) surcharge storage

c) bank storage

d) dead storage

18 / 30

18. 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

19 / 30

19. A fall, which maintains its depth, is

a) a low weir fall

b) a trapezoidal notch fall

c) a rectangular notch fall

d) all of the above

20 / 30

20. 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

21 / 30

21. If the value of sodium-absorption ratio lies between 10 to 18, it is called

a) low sodium water

b) medium sodium water

c) high sodium water

d) very high sodium water

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 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

24 / 30

24. Whenever an embankment has to be built on unreliable soil, provision is made for

a) sand core

b) percolation

c) clay puddle

d) all of the above

25 / 30

25. *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

26 / 30

26. 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

27 / 30

27. Crop water is proportional to

a) evapo-transpiration

b) effective rainfall

c) seepage of water

d) all of the above

28 / 30

28. 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

29 / 30

29. Which of the following is a leguminous crop?

a) rice

b) potato

c) groundnut

d) hemp

30 / 30

30. 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

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Irrigation Engineering Online Test – Paper 2

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