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. *Drop structures in the canal are provided for

a) providing a bridge

b) energy dissipation

c) maintaining ground slope

d) creating high velocity

2 / 30

2. 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

3 / 30

3. *Economic height of a dam is

a) very low

b) very high

c) corresponds to the minimum cost of a dam per unit of storage

d) none of the above

4 / 30

4. A wall built along the bank of a river, parallel to the direction of flow for directing fast flow from a sluice or spillway, to prevent eroding banks of a river or canal, is called

a) toe wall

b) training wall

c) wing wall

d) divide wall

5 / 30

5. Retrogression of the bed level of a river downstream a weir or barrage occurs due to

a) heavy impact of water

b) less percentage of silt

c) increase of the bed level

d) soft soil strata

6 / 30

6. 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

7 / 30

7. The overflow portion of dam, over which surplus discharge flows from the reservoir to the downstream is known as:

a) spillway

b) dam

c) groyne

d) channel

8 / 30

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

a) days

b) weeks

c) months

d) years

9 / 30

9. *The structure constructed to allow drainage water to flow under pressure through an inverted syphon below a canal is called

a) a syphon

b) aqueduct

c) syphon aqueduct

d) super passage

10 / 30

10. According to Lacey's theory, the silt supporting eddies are generated from

a) the bottom of the channel

b) the side of the channel

c) both (a) and (b) above

d) none of the above

11 / 30

11. In a non-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

12 / 30

12. A fall in a canal bed is generally provided if

a) the ground slope exceeds the designed bed slope

b) the designed bed slope exceeds the ground slope

c) the ground slope is practically the same as the designed bed slope

d) none of the above

13 / 30

13. 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

14 / 30

14. 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

15 / 30

15. 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

16 / 30

16. 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

17 / 30

17. Crop water is proportional to

a) evapo-transpiration

b) effective rainfall

c) seepage of water

d) all of the above

18 / 30

18. The ratio of the quantity of water stored in the root zone of the crops to the quantity of water actually delivered in the field is known as

a) water conveyance efficiency

b) water application efficiency

c) water use efficiency

d) any of the above

19 / 30

19. Tortuosity of a meandering river is the ratio of

a) meander length and meander belt

b) curved length along the channel to the direct axial length of the river reach

c) direct axial length of the river reach to the curved length of the channel

d) meander belt to meander length

20 / 30

20. *Which of the following is not a cross drainage work?

a) aqueduct

b) super passage

c) level crossing

d) drain crossing

21 / 30

21. *A groyne

a) widens a river channel to improve its depth

b) deteriorates the river banks

c) silts up the area in the vicinity by creating a slack flow

d) none of the above

22 / 30

22. A weir, which has a tail water level higher than the weir crest, by which the discharge is affected, is called

a) negative head weir

b) submerged weir

c) flooded weir

d) none of the above

23 / 30

23. 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

24 / 30

24. 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

25 / 30

25. 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

26 / 30

26. *For no tension to develop at the base of a gravity dam, the maximum permissible eccentricity is

a) B/6

b) B/3

c) B/2

d) all of the above

27 / 30

27. *In a syphon aqueduct, the maximum uplift pressure on the floor occurs when

a) the canal is full

b) the canal is full and drainage is dry

c) the canal is empty and the water table in the stream rises to the canal bed

d) both canal and drainage are full

28 / 30

28. 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

29 / 30

29. *The difference in level between the top of a bank and full supply level in a canal is known as

a) berm

b) freeboard

c) height of the bank

d) none of the above

30 / 30

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

a) reclamation

b) leaching

c) efflorescence

d) salinity

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Irrigation Engineering Online Test – Paper 2

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