Home» Online Test » Civil Engineering » Irrigation Engineering Online Test » Paper 1 » Paper 2 » Paper 3 0% Sorry, time's up. To complete the online test, please restart it. Created by Vikash chaudhary This is a FREE online test. Beware of scammers who ask for money to attend this test. Get fresh, new questions in each attempt. Total Questions: 50 Time Allotted: 50 minutes Passing Score: 70% Randomization: Yes Certificate: Yes Do not refresh the page! 👍 All the best! 1 / 50 1. 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 2 / 50 2. 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 3 / 50 3. In a syphon spillway, the effective head is measured a) as the difference in levels of water upstream and downstream of the spillway b) as the difference in levels between the headwater and the average ground level c) as the height of the crest above ground d) none of the above 4 / 50 4. As per Lacey's theory, the silt factor is a) directly proportional to average particle size b) directly proportional to the square root of the average particle size c) inversely proportional to average particle size d) not related to the average particle size 5 / 50 5. The average delta of a rice crop is nearly a) 30 cm b) 60 cm c) 120 cm d) 150 cm 6 / 50 6. *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 7 / 50 7. *In a concrete-lined canal, the permissible velocity of water is a) 1 m/sec b) 2 m/sec c) 3 m/sec d) 4 m/sec 8 / 50 8. 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 9 / 50 9. *The maximum discharge through a circular channel takes place when the depth of flow is equal to a) 0.95 times the diameter b) 0.8 times the diameter c) 0.6 times the diameter d) 0.5 times the diameter 10 / 50 10. For an earthen dam, least suited spillway is: a) ogee spillway b) chute spillway c) shaft spillway d) none of the above 11 / 50 11. A sudden fall of the level of the ground along the alignment of the canal joined by an inclined bed is called a a) jump b) sudden fall c) rapid fall d) hydraulic jump 12 / 50 12. For any crop, the base period is measured in a) days b) weeks c) months d) years 13 / 50 13. 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 14 / 50 14. 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 15 / 50 15. Waterlogging of fields can be reduced by a) providing canal lining b) providing intercepting drains c) controlling intensity of irrigation d) all of the above 16 / 50 16. *When a canal is carried over a natural drainage, the structure provided is known as a) siphon b) aqueduct c) super passage d) syphon aqueduct 17 / 50 17. 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 18 / 50 18. *Drain over the irrigation canal is achieved by providing a) a siphon b) super passage c) an aqueduct d) both (a) and (b) above 19 / 50 19. In a reservoir, which type of storage is normally used? a) useful storage b) surcharge storage c) bank storage d) dead storage 20 / 50 20. *The elementary profile of a dam is a) a trapezoidal b) a right-angled triangle c) rectangular d) none of the above 21 / 50 21. *Separation of flow occurs when a) the pressure intensity reaches a minimum b) the cross-section of a channel is reduced c) the boundary layer comes to rest d) the head is maximum 22 / 50 22. *A facing of dry stone pitching or other material laid on a sloping face of earth to maintain the slope in position or to protect it from erosion is called a) reinforcement b) revetment c) lining d) none of the above 23 / 50 23. A river bend in alluvial soil is characterized by a) silting on the convex side b) scouring on the concave side c) both (a) and (b) of above d) silting on the concave side and scouring on the convex side 24 / 50 24. Salt present in water, harmful for cultivation purposes, is a) sodium carbonate b) potassium sulfate c) calcium sulfate d) none of the above 25 / 50 25. For the maximum velocity occurring in a canal, the hydraulic mean depth is a) minimum b) maximum c) medium d) none of the above 26 / 50 26. A weir constructed to divert part or all of the water from the stream into a different course is called a) free weir b) intake weir c) submerged weir d) none of the above 27 / 50 27. The forces considered for the analysis of an elementary profile of a gravity dam under an empty reservoir condition are a) uplift pressure b) water pressure c) self-weight d) earthquake pressure 28 / 50 28. According to Lacey's theory, the depth of scour in the case of a right-angle bend is a) 1.414D b) 1.667D c) 2D d) 2.5D 29 / 50 29. The effective precipitation for a crop is the water which is equal to a) water stored in the soil within the root zone of the crop b) total precipitation during the crop period c) total precipitation minus the loss due to infiltration d) none of the above 30 / 50 30. In irrigation canals, drops are needed if a) the width of the canal is less than its depth b) the velocity of flow is less than the critical one c) the natural slope is very steep d) the natural slope is very smooth 31 / 50 31. *A deep well a) is always deeper than a shallow well b) has more discharge than a shallow well c) is structurally weaker than a shallow well d) both A and B above 32 / 50 32. *The most efficient section of a channel is a) triangular b) rectangular c) square d) trapezoidal 33 / 50 33. *The maximum failure of earthen dams occurs due to a) erosion due to the velocity of water b) slipping due to steeper slopes c) over topping due to insufficient height d) leakage due to cavities 34 / 50 34. Silt is a a) fertilizing agent b) non-fertilizing agent c) type of crop d) type of rock 35 / 50 35. The uplift pressure acting on a dam is controlled by a) pressure grouting in the foundation b) constructing drainage channels between the dam and its foundation c) constructing a cutoff under the upstream face d) all of the above 36 / 50 36. *Meandering of rivers is caused by a) excessive discharge during the floods, when turbulence is developed b) increase in width c) heavy deposition d) all of the above 37 / 50 37. *The maximum amount of water required in the case of paddy is at the time of a) puddling b) seeding c) harvesting d) flowering 38 / 50 38. *When the water table is within the root zone depth and is detrimental to plant life, the land is said to be a) over nourished b) super-saturated c) waterlogged d) undernourished 39 / 50 39. *The obstruction across the river required to raise its water level and divert the water into the canal is called a) weir or anicut b) divide wall c) guide bank d) under sluice 40 / 50 40. *A diversion head work is constructed to a) raise the water level at the head of the canal b) regulate the intake of water into the canal c) reduce fluctuations in the supply level of the river d) all of the above 41 / 50 41. 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 42 / 50 42. In a gravity dam, the main overturning force is a) self-weight of the dam b) wind pressure c) water pressure d) uplift pressure 43 / 50 43. Waterlogging may result from a) over-irrigation b) inadequate drainage c) seepage from adjoining reservoirs, etc. d) all of the above 44 / 50 44. Top of the weir is, a) ridgecrest b) crest c) head d) peak 45 / 50 45. 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 46 / 50 46. *Fall is provided in the canal of a) ridge b) valley c) contour d) inundation 47 / 50 47. *Bell bunds are a) guide bands for training a river at the site of a bridge or weir b) barriers made of timber, filled with stone or other suitable material c) fixed distances over which surface floats are lined d) none of the above 48 / 50 48. For irrigation purposes, the pH value of water should be a) between 3 and 6 b) between 6 and 8.5 c) between 8.5 and 11 d) more than 11 49 / 50 49. *Which of the following is not a cross drainage work? a) aqueduct b) super passage c) level crossing d) drain crossing 50 / 50 50. Silt excluders are constructed on the a) river bed down stream of the head regulator b) river bed up stream of the head regulator c) canal bed up stream of the head regulator d) canal bed down stream of the head regulator Please provide accurate information so we can send your Achievement Certificate by mail. NameEmailPhone Number Your score is Share your achievement! LinkedIn Facebook Twitter 0% Restart Test Please provide your feedback. Thank you for your valuable feedback. Send feedback Buy Irrigation Engineering MCQ PDF for Offline Study
