irrigation water resources engineering and hydrology MCQs – Page 2

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
21. If it rains between 2 P.M. and 3 P.M. and the entire basin area just starts contributing water at 3 P.M. to the outlet, then time of concentration will be_____________________?
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A. 30 minutes

B. 20 minutes

C. 60 minutes

D. 15 minutes

22. A river bend characterized by silting_______________?
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A. scouring on concave side

B. scouring on concave side and silting on convex side

C. scouring on convex side and on concave side

D. silting on convex side

23. If there are two canals taking off from each flank of a river, then there will be____________________?
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A. two divide walls and one undersluice

B. two divide walls and two undersluices

C. one divide wall and two undersluices

D. one divide wall and one undersluice

24. For supplying water to rabi crop, kharif crop and sugarcane, the channel is designed for a capacity equal to the greater of the water requirement of_______________?
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A. rabi or kharif

B. rabi and kharif or sugarcane

C. rabi and sugarcane or kharif and sugarcane

D. rabi or kharif or sugarcane

25. With the increase in the quantity of water supplied, the yield of most crops_________________?
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A. increases upto a certain limit and then decreases

B. increases upto a certain limit and then becomes constant

C. decreases continuously

D. increases continuously

26. Unit of runoff in M.K.S. system is________________?
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A. square metre

B. cubic metre

C. metre/sec

D. cubic metre/sec
27. In a chute spillway, the flow is usually____________________?
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A. uniform

B. super critical

C. critical

D. subcritical

28. If the R.Ls of canal bed level and high flood level of drainage are 212.0 m and 210.0 m respectively, then cross drainage work will be________________?
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A. superpassage

B. syphon

C. aqueduct

D. syphon aqueduct

29. A runoff river plant is____________?
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A. none of the above

B. a high head scheme

C. a low head scheme

D. a medium head scheme

30. In a Sarda type fall, rectangular crest is used for discharge upto______________?
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A. 14 cumecs

B. 6 cumecs

C. 10 cumecs

D. 20 cumecs

31. When the reservoir is full, the maximum compressive force in a gravity dam is produced______________?
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A. at the heel

B. at the toe

C. at centre of base

D. within the middle third of base

32. The most suitable chemical which can be applied to the water surface for reducing evaporation is________________?
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A. methyl alcohol

B. ethyl alcohol

C. butyl alcohol

D. cetyl alcohol
33. The outlet discharge factor is the duty at the head of_________________?
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A. watercourse

B. branch canal

C. distributory

D. main canal

34. Infiltration rate is always________________?
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A. less than the infiltration capacity

B. equal to or more than the infiltration capacity

C. more than the infiltration capacity

D. equal to or less than the infiltration capacity
35. A hyetograph is a graphical representation of___________________?
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A. cumulative rainfall and time

B. discharge and time

C. rainfall intensity and time

D. rainfall depth and time

36. Infiltration capacity_________________?
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A. is a constant factor

B. changes with time

C. changes with location

D. changes with both time and location
37. If D is the depth of scour below original bed, then the width of launching apron is generally taken as________________?
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A. 1.2 D

B. 2.0 D

C. 2.5 D

D. 1.5 D
38. Dimensions of coefficient of transmissibility are______________?
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A. MLT

B. MLV

C. M L2 T1

D. rvfLT1

39. The water utilizable by plants is available in soils mainly in the form of________________?
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A. chemical water

B. gravity water

C. capillary water

D. hydroscopic water

40. When the upstream face of a gravity dam is vertical, then the intensity of water pressure at the water surface and at the base respectively will be_______________?
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A. wH and 0

B. OandwII

C. 0 and wH212

D. wH2/2and wH2/3