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. *Total losses in the canal are a) 40% of the total discharge b) 10% of the total discharge c) 60% of the total discharge d) equal to seepage losses 2 / 50 2. On rolling land, the method of applying water is a) check flooding b) free flooding c) border flooding d) furrow flooding 3 / 50 3. 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 4 / 50 4. *To avoid an interruption in the field of a siphon, the air vessel is provided a) at the summit b) at the inlet c) at the outlet d) none of the above 5 / 50 5. For an earthen dam, least suited spillway is: a) ogee spillway b) chute spillway c) shaft spillway d) none of the above 6 / 50 6. *Water-holding capacity of clay is a) highest among all soils b) minimum among all soils c) same as silt and fine sand d) zero 7 / 50 7. 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 8 / 50 8. The sudden and turbulent passage of water from a low level critical depth to high level above critical depth, during which the velocity passes from supercritical to subcritical, is known as a) jump b) hydraulic jump c) sudden fall d) all of the above 9 / 50 9. The method for training of rivers is a) groynes b) guide bank c) pitched banks d) all of the above 10 / 50 10. According to Khosla's theory, the exit gradient a) depends on d/b ratio b) depends on b/d ratio c) cannot exceed unity d) can be zero 11 / 50 11. *Bed bars in a canal are provided a) to raise the supply level b) to measure the discharge c) to watch the general behavior of the canal d) to control the silting 12 / 50 12. *Meandering of the river increases the length of the river while cut-off a) increase in the width of the river b) decrease the length of the river c) increase the length of the river d) decrease the width of the river 13 / 50 13. Guide banks for training a river at the site of a bridge or weir are called a) safe bunds b) guide bunds c) side bunds d) bell bunds 14 / 50 14. *Main purpose of mean water training for rivers is a) flood control b) to keep the channel in good shape by sufficient disposal of suspended and bed load c) to provide sufficient depth of water in navigable channels during low water position d) all of the above 15 / 50 15. 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 16 / 50 16. 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 17 / 50 17. Percolation loss is less in the case of a) sandy soil b) black cotton soil c) silty soil d) all of the above 18 / 50 18. *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 19 / 50 19. *Lining of an irrigation channel a) increases the waterlogging area b) decreases the waterlogging area c) does not change the waterlogging area d) none of the above 20 / 50 20. *The main function of the diversion headworks of a canal from a river is a) to remove silt b) to control floods c) to store water d) to raise water level 21 / 50 21. *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 22 / 50 22. *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 23 / 50 23. *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 24 / 50 24. The flow of water after spilling over the spillway respectively is a) at a right angle and parallel to the weir crest b) parallel and at a right angle to the weir crest c) parallel to the weir crest in both d) none of the above 25 / 50 25. The fall is designed and constructed to satisfy the condition that a) the velocity of approach should be minimum b) it should be able to admit variations of water levels in the canal c) bed, bank, and downstream position should be safe against erosion due to the excess energy of flow d) all of the above 26 / 50 26. Necessity of cross-drainage works arises when a) canal is aligned on the watershed across a number of drainages b) canals are aligned away from the watershed because the area of the watershed is less suitable than other areas c) a number of canal systems have to be linked d) all of the above 27 / 50 27. *After entering the canal, sediments are removed by the a) silt ejector b) silt excluder c) silt regulator d) none of the above 28 / 50 28. A multipurpose reservoir is a) planned and constructed to serve various purposes b) designed for one purpose but serves more purposes c) both (a) and (b) d) none of the above 29 / 50 29. Lands or climate that lack sufficient water for agriculture without artificial irrigation are called a) dry zone b) arid zone c) semi-arid zone d) hybrid arid zone 30 / 50 30. The type of fall suitable for any discharge is a) vertical type b) straight glacis fall with baffle wall c) straight glacis fall without a baffle wall d) all of the above 31 / 50 31. 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 32 / 50 32. The fertility of the soil is adversely affected when the pH value is more than a) 7 b) 9 c) 11 d) 14 33 / 50 33. 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 34 / 50 34. If the RLs of canal bed level and high flood level of drainage are 210.0 m and 212.0 m respectively, then the cross drainage work will be a) aqueduct b) super passage c) syphon aqueduct d) none of the above 35 / 50 35. The time (generally in days) for which a crop occupies a field to attain its maturity is known as a) duty b) base period c) delta d) yield period 36 / 50 36. The other name for an unconfined aquifer is a) temporary aquifer b) permanent aquifer c) free aquifer d) perched aquifer 37 / 50 37. *Pick up the correct sequence of the parts of a canal system a) head works - distributary - branch canal - minor b) head works - main canal - branch canal - minor - distributary c) head works - main canal - branch canal - distributary - minor d) head works - branch canal - main canal - distributary 38 / 50 38. As the coefficient of friction increases, the velocity of water in a canal a) increases b) decreases c) remains constant d) none of the above 39 / 50 39. *Fall is provided in the canal of a) ridge b) valley c) contour d) inundation 40 / 50 40. A repelling groyne is aligned a) parallel to bank b) perpendicular to bank c) pointing up stream d) pointing down stream 41 / 50 41. The numerical value of the base period is a) less than the crop period b) more than the crop period c) equal to the crop period d) all of the above 42 / 50 42. *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 43 / 50 43. River resulting from a deficit of sediments in flowing water is a) degrading type b) aggrading type c) meandering type d) none of the above 44 / 50 44. *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 45 / 50 45. Pitot tube is used to measure a) area b) velocity c) discharge d) none of the above 46 / 50 46. *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 47 / 50 47. The most suitable section of a lined canal is a) triangular section with a circular bottom for small canals b) trapezoidal section with rounded corners for large canals c) both (a) and (b) above d) none of the above 48 / 50 48. 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 49 / 50 49. Tail race a) is a channel conducting water away from a water wheel b) has a gradient steeper than that of the canal c) is the channel between the silt extractor and the river through which the escape water is discharged d) all of the above 50 / 50 50. *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 Please provide accurate information so we can send your Achievement Certificate by mail. 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