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irrigation water resources engineering and hydrology MCQs

Practise focused irrigation water resources engineering and hydrology questions with marked answers for exam preparation and subject revision.

irrigation water resources engineering and hydrology Mcqs
1. Which of the following canal structures is used to remove surplus water from an irrigation channel into a natural drain ?
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A. canal fall

B. canal regulator

C. canal escape

D. canal outlet

2. Vertical drop fall is satisfactory for a height upto ___________?
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A. 0.5 m

B. 5.0 m

C. 3.5 m

D. 1.5 m
3. River training for depth is achieved by_______________?
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A. groynes

B. construction of dykes or leavees

C. both (A) and (B)

D. groynes and bandalling
4. As per Laceys theory, the silt factor is_________________?
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A. inversely proportional to average particle size

B. not related to average particle size

C. directly proportional to average particle size

D. directly proportional to square root of average particle size
5. The ratio of rate of change of the discharge of an outlet to the rate of change of the discharge of distributing channel is called________________?
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A. proportionality

B. flexibility

C. sensitivity

D. setting

6. The area between the isohyets 45 cm and 55 cm is 100 square km and between 55 cm and 65 cm is 150 square km. The average depth of annua! precipitation over the above basin of 250 square km will be__________________?
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A. 60 cm

B. 55 cm

C. 56 cm

D. 50 cm

7. The value of Sodium Absorption Ratio for high sodium water lies between________________?
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A. 26 to 34

B. 10 to 18

C. 0 to 10

D. 18 to 26
8. For wave action in dams, the maximum height of freeboard is generally taken to be equal to_______________?
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A. 0.5 hw

B. 0.75 hw

C. 1.25 hw

D. 1.50 hw
9. S-hydrograph is used to obtain unit hydrograph of________________?
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A. shorter duration from longer duration

B. longer duration from shorter duration

C. both (A) and (B)

D. none of the above

10. A multipurpose reservoir is the one which is_________________?
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A. designed for one purpose but serves more than one purpose

B. planned and constructed to serve various purposes

C. both (A. and (B.

D. none of the above

11. The flow-mass curve is graphical representation of__________________?
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A. cumulative discharge and time

B. discharge and time in chronological order

C. discharge and percentage probability of flow being equaled or exceeded

D. cumulative discharge, volume and time in chronological order
12. The water stored in the reservoir below the minimum pool level is called_______________?
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A. valley storage

B. dead storage

C. useful storage

D. surcharge storage

13. Seepage through foundation in an earthen dam is controlled by providing___________________?
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A. horizontal blanket

B. impervious cut off

C. rock toe

D. chimney drain

14. As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at_____________?
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A. same level

B. higher level

C. lower level

D. any of the above depending on the design

15. The maximum average depth due to one day storm over an area of 100 km2 is 100 mm. Depth-Area-Duration (DAD. curves indicate that for the same area of 100 km2 the maximum average depth for a 3 hour storm will be__________________?
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A. none of the above

B. more than 100 mm

C. 100 mm

D. less than 100 mm

16. According to Khoslas theory, the exit gradient in the absence of a downstream cutoff is_____________?
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A. very large

B. unity

C. infinity

D. 0

17. The sensitivity of a rigid module is_______________?
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A. 1

B. zero

C. infinity

D. between zero and one

18. The unit hydrograph due to a storm may be obtained by dividing the ordinates of the direct runoff hydrograph by_______________?
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A. period of storm

B. direct runoff volume

C. total rainfall

D. none of the above

19. Which of the following is a non-recording raingauge ?
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A. Stevens weighing type raingauge

B. tipping bucket type raingauge

C. floating type raingauge

D. Simons raingauge
20. The meander pattern of a river is developed by_________________?
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A. average discharge

B. maximum discharge

C. dominant discharge

D. critical discharge