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. The method for training of rivers is

a) groynes

b) guide bank

c) pitched banks

d) all of the above

2 / 30

2. Weirs designed and constructed on Bligh's theory failed due to

a) undermining of floors

b) undermining of the sub-soil

c) undermining of the foundation work

d) all of the above

3 / 30

3. Which of the following is a leguminous crop?

a) rice

b) potato

c) groundnut

d) hemp

4 / 30

4. *When the canal runs below the drain, the cross drainage work provided is called

a) aqueduct

b) super passage

c) level crossing

d) syphon

5 / 30

5. The upstream face of an earthen dam is

a) a flow line

b) a phreatic line

c) a cubic parabola

d) none of the above

6 / 30

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

a) adsorption

b) absorption

c) ozonization

d) sedimentation

7 / 30

7. Darcy's formula is given by

a) the rate of flow is proportional to the hydraulic gradient

b) the rate of flow is proportional to the exit gradient

c) the rate of discharge is proportional to the hydraulic gradient

d) the rate of discharge is proportional to the exit gradient

8 / 30

8. The mean velocity, for a channel of given depth, which will just keep the channel free from silting or scouring its bed throughout the year, is called

a) optimum velocity

b) ideal velocity

c) critical velocity

d) all of the above

9 / 30

9. Cross walls provided across the stream, built under the floor of a hydraulic structure at the upstream and downstream ends of the pavement to avoid scour and protect floors, abutments etc., and which is carried up to another, is called

a) back walls

b) curtain wall

c) flarred wall

d) parapet wall

10 / 30

10. 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

11 / 30

11. A low gravity dam is the one in which

a) the height of the water stored is less than 30 m

b) the resultant just passes through the downstream middle third point

c) the maximum principal stress is less than the allowable crushing strength and the upstream face is vertical

d) the height of the dam is less than 5 times the top width

12 / 30

12. *Lime concrete lining is used

a) when the velocity of flow is below 2 m/sec

b) in irrigation channels with capacities up to 200 cumecs

c) where economy is required

d) all of the above

13 / 30

13. *A silt regulator located at the head of a channel is called

a) silt ejector

b) silt excluder

c) silt sweeper

d) silt washer

14 / 30

14. Optimum depth of kor watering for a rice crop is

a) 13.5 cm

b) 16.5 cm

c) 19 cm

d) 21 cm

15 / 30

15. *River training for depth is achieved by

a) groynes

b) dykes of leaves

c) groynes and bandalling

d) all of the above

16 / 30

16. The water utilized by plants is available in soils mainly in the form of

a) capillary water

b) gravity water

c) hygroscopic water

d) pore water

17 / 30

17. The supply passing down the parent channel is controlled by

a) head regulator

b) cross regulator

c) distributary head regulator

d) all of the above

18 / 30

18. On a suitable foundation, the earthen dam can be constructed up to a height of

a) 50 m

b) 100 m

c) 150 m

d) 200 m

19 / 30

19. *Diversion headwork is constructed to

a) lower water level in the river

b) regulate the intake of water into the canal

c) regulate silt entry into the canal

d) all of the above

20 / 30

20. The type of irrigation during a low quantity of water

a) sprinkler irrigation

b) drip irrigation

c) free flooding

d) furrow method

21 / 30

21. The kharif crop is sown

a) at the end of summer

b) at the end of the north-east monsoon

c) at the beginning of the south-west monsoon

d) in mid-summer

22 / 30

22. 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

23 / 30

23. *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

24 / 30

24. A straight glacis type fall with a baffle platform and a baffle wall is called

a) montague fall

b) sarda type fall

c) glacis fall

d) inglis fall

25 / 30

25. SHAFT spillway is the same as

a) conduit spillway

b) tunnel spillway

c) morning glory spillway

d) trough spillway

26 / 30

26. 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

27 / 30

27. Waterlogging may result from

a) over-irrigation

b) inadequate drainage

c) seepage from adjoining reservoirs, etc.

d) all of the above

28 / 30

28. An excavation in the base of a dam or other structures filled with relatively impervious material to reduce percolation is called

a) cut-off trench

b) key trench

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

d) none of the above

29 / 30

29. Percolation loss is less in the case of

a) sandy soil

b) black cotton soil

c) silty soil

d) all of the above

30 / 30

30. *The discharge in an open channel is inversely proportional to

a) roughness of the section

b) sectional area

c) slope of the channel

d) hydraulic radius

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