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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Certificate: No
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1 / 30

1. 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

2 / 30

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

a) uplift pressure

b) water pressure

c) self-weight

d) wave pressure

3 / 30

3. *In irrigation canals, the reasons for water losses are

a) absorption

b) evaporation

c) percolation

d) all of the above

4 / 30

4. A canal which is aligned at right angles to the contour is called

a) contour canal

b) branch canal

c) side slope canal

d) none of the above

5 / 30

5. In a canal syphon, flow is

a) pipe flow

b) under negative pressure

c) under atmospheric pressure

d) none of the above

6 / 30

6. *The structure provided where natural drainage and canal meet at the same level is

a) aqueduct

b) siphon

c) super passage

d) level crossing

7 / 30

7. A repelling groyne is aligned

a) parallel to bank

b) perpendicular to bank

c) pointing up stream

d) pointing down stream

8 / 30

8. The bed of a canal is lowered in the case of

a) level crossing

b) canal siphon

c) siphon aqueduct

d) none of the above

9 / 30

9. The width of a "Dowels" is generally kept between 32 to 60 cm, and the height above the road level should be more than

a) 10 cm

b) 20 cm

c) 30 cm

d) 40 cm

10 / 30

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

a) surface irrigation

b) lift irrigation

c) sprinkler irrigation

d) furrow irrigation

11 / 30

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

a) laminar

b) turbulent

c) critical

d) supercritical

12 / 30

12. According to Lacey's regime theory, a channel is said to be in its regime when it satisfies the condition

a) discharge is constant

b) silt grade and silt charge are constant

c) the channel is flowing in incoherent unlimited alluvial soil of the same nature as that transported

d) all of the above

13 / 30

13. *Groynes are generally provided

a) attractive

b) deflective

c) repelling

d) all of the above

14 / 30

14. *Site of the head works is good when

a) it is situated on a river bend

b) it is close to the irrigated area

c) good foundation is available for the structure

d) both B and C above

15 / 30

15. *The meandering river is always

a) maximum discharge

b) average discharge

c) dominant discharge

d) none of the above

16 / 30

16. 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

17 / 30

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

a) check flooding

b) free flooding

c) border flooding

d) furrow flooding

18 / 30

18. *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

19 / 30

19. 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

20 / 30

20. The main advantage of lining an irrigation channel is

a) a reduction in the loss of water due to seepage

b) economy in the use of cultivable land which would otherwise be prone to water logging

c) withstand higher velocities so causing a proportional reduction in cross-sectional area

d) all of the above

21 / 30

21. If the demand line drawn from a ridge in a flow-mass curve does not intersect the curve again, it shows

a) demand cannot be met by inflow

b) reservoir was not full at the beginning

c) both (a) and (b)

d) none of the above

22 / 30

22. The duty is largest

a) at the head of the main canal

b) at the head of the watercourse

c) on the field

d) same at all places

23 / 30

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

a) sodium carbonate

b) potassium sulfate

c) calcium sulfate

d) none of the above

24 / 30

24. The operation during the infiltration of water below the ground surface is

a) adsorption

b) absorption

c) ozonization

d) sedimentation

25 / 30

25. Trap efficiency of a reservoir is a function of

a) capacity/Inflow ratio

b) capacity/outflow ratio

c) the total inflow

d) age of the reservoir

26 / 30

26. A protection at the downstream end of a weir or fall, consisting of blocks of concrete or masonry, is called

a) scour

b) baffles

c) talus

d) flank wall

27 / 30

27. *A diversion head work is constructed to

a) raise the water level at the head of the canal

b) regulate the intake of water into the canal

c) reduce fluctuations in the supply level of the river

d) all of the above

28 / 30

28. *Surface float method is used to measure

a) area

b) velocity

c) discharge

d) none of the above

29 / 30

29. *Single bank canal is the other name for

a) ridge canal

b) contour canal

c) side slope canal

d) none of the above

30 / 30

30. *The most efficient section of a channel is

a) triangular

b) rectangular

c) square

d) trapezoidal

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Irrigation Engineering Online Test – Paper 2

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