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. *Mean velocity of the canal should never be

a) less than the critical velocity

b) more than the critical velocity

c) equal to the critical velocity

d) none of the above

2 / 30

2. *The discharge through a channel is maximum when

a) m = d/3

b) m = b/2

c) m = d

d) m = 1.5d

3 / 30

3. According to Kennedy's theory, the silt supporting eddies are generated due to

a) roughness of the bed

b) roughness of the sides

c) both (a) and (b) above

d) none of the above

4 / 30

4. The amount of evaporation loss is

a) 1 to 2 percent of the water entering the canal

b) 2 to 5 percent of the water entering the canal

c) 5 to 10 percent of the water entering the canal

d) 50 to 20 percent of the water entering the canal

5 / 30

5. 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

6 / 30

6. *The elementary profile of a dam is

a) a trapezoidal

b) a right-angled triangle

c) rectangular

d) none of the above

7 / 30

7. The most desirable alignment of an irrigation canal is along

a) a contour line

b) the ridge line

c) the valley line

d) none of the above

8 / 30

8. The ratio of the rate of change of the discharge of an outlet to the rate of change of the discharge of the distributing channel is called

a) sensitivity

b) flexibility

c) proportionality

d) setting

9 / 30

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

a) reclamation

b) leaching

c) efflorescence

d) salinity

10 / 30

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

a) adsorption

b) absorption

c) ozonization

d) sedimentation

11 / 30

11. 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

12 / 30

12. 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

13 / 30

13. Vertical acceleration due to an earthquake results in

a) an increase in the effective weight of the dam

b) a decrease in the effective weight of the dam

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

d) none of the above

14 / 30

14. 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

15 / 30

15. 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

16 / 30

16. Silt is a

a) fertilizing agent

b) non-fertilizing agent

c) type of crop

d) type of rock

17 / 30

17. *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

18 / 30

18. In a gravity dam, the main overturning force is

a) self-weight of the dam

b) wind pressure

c) water pressure

d) uplift pressure

19 / 30

19. The types of reservoirs in which water control devices are not provided are known as:

a) retarding reservoir

b) detention reservoir

c) both (a) and (b)

d) none of the above

20 / 30

20. 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

21 / 30

21. *The phenomenon of salts coming up in solution and forming a layer of crust on the surface after the evaporation of water is known as

a) reclamation

b) leaching

c) efflorescence

d) salinity

22 / 30

22. 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

23 / 30

23. The discharge capacity of the undersluice is

a) twice the maximum discharge of the off-taking canal

b) 20% of maximum flood discharge

c) maximum winter discharge

d) greatest of all of the above

24 / 30

24. 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

25 / 30

25. 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

26 / 30

26. 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

27 / 30

27. In an earthen dam, seepage through the foundation is controlled by providing

a) impervious cut off

b) none of the above

c) chimney drain

d) horizontal blanket

28 / 30

28. Crop ratio is the ratio of area irrigated

a) in rabi season to kharif season

b) in kharif season to rabi season

c) under perennial crop to total crop

d) under perennial crop to non-perennial crop

29 / 30

29. For the maximum velocity occurring in a canal, the hydraulic mean depth is

a) minimum

b) maximum

c) medium

d) none of the above

30 / 30

30. *Fall is provided in the canal of

a) ridge

b) valley

c) contour

d) inundation

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Irrigation Engineering Online Test – Paper 2

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