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. Salt present in water, harmful for cultivation purposes, is

a) sodium carbonate

b) potassium sulfate

c) calcium sulfate

d) none of the above

2 / 30

2. As compared to the crest of the normal portion of the weir, the crest of the undersluice portion of the weir is kept at

a) higher level

b) same level

c) lower level

d) all of the above

3 / 30

3. 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

4 / 30

4. 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

5 / 30

5. A counter berm 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

6 / 30

6. The numerical value of the base period is

a) less than the crop period

b) more than the crop period

c) equal to the crop period

d) all of the above

7 / 30

7. Aggrading river is characterized by

a) losing its bed

b) building up its beds

c) meandering

d) low discharge, low gradient

8 / 30

8. *Drop structures in the canal are provided for

a) providing a bridge

b) energy dissipation

c) maintaining ground slope

d) creating high velocity

9 / 30

9. Water found on the surface of the soil, which is not capable of movement either by gravity or capillary and can only be driven off by heat, is called

a) water vapour

b) moisture

c) hygroscopic water

d) none of the above

10 / 30

10. Which of the following is a leguminous crop?

a) rice

b) potato

c) groundnut

d) hemp

11 / 30

11. *Bell bunds are

a) guide bands for training a river at the site of a bridge or weir

b) barriers made of timber, filled with stone or other suitable material

c) fixed distances over which surface floats are lined

d) none of the above

12 / 30

12. A spoil bank is formed when

a) the canal has a steep bed slope

b) the volume of excavation is in excess of the embankment filling

c) the canal section is too large

d) the canal alignment is meandrous

13 / 30

13. 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

14 / 30

14. *After entering the canal, sediments are removed by the

a) silt ejector

b) silt excluder

c) silt regulator

d) none of the above

15 / 30

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

a) useful storage

b) surcharge storage

c) bank storage

d) dead storage

16 / 30

16. *The crops require maximum water during

a) first watering when the crop has grown a few centimeters

b) first watering before sowing the crops

c) last watering before harvesting

d) all of the above

17 / 30

17. For any crop, the base period is measured in

a) days

b) weeks

c) months

d) years

18 / 30

18. *Which of the following has the maximum water application efficiency?

a) surface irrigation

b) lift irrigation

c) sprinkler irrigation

d) furrow irrigation

19 / 30

19. 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

20 / 30

20. *The most efficient section of a channel is

a) triangular

b) rectangular

c) square

d) trapezoidal

21 / 30

21. Obstruction placed on the downstream floor of a fall to dissipate the velocity of the flowing water and maintain the standing wave on the glacis is known as

a) energy block

b) friction block

c) rough block

d) waste block

22 / 30

22. 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

23 / 30

23. Crop water is proportional to

a) evapo-transpiration

b) effective rainfall

c) seepage of water

d) all of the above

24 / 30

24. 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

25 / 30

25. According to Khosla's theory, the undermining of the floor starts from the

a) tail end

b) starting end

c) intermediate point

d) foundation bed

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. *The process by which unculturable soil made culturable is known as

a) reclamation

b) leaching

c) efflorescence

d) salinity

28 / 30

28. *The discharge through a trapezoidal channel is maximum when

a) half of the top width = sloping side

b) top width = half of sloping side

c) top width = sloping side

d) top width = 1.5x sloping side

29 / 30

29. Disposal of extra excavated earth of canals is utilized to provide a spoil bank on

a) the left side

b) the right side

c) none of the above

d) all of the above

30 / 30

30. *Silt-carrying capacity of water in a canal depends on

a) silt charge

b) discharge

c) surface slope

d) all of the above

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Irrigation Engineering Online Test – Paper 2

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