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 New Questions in Each Attempt Total Questions: 30 Time Allotted: 30 minutes Passing Score: 50% Randomization: Yes Certificate: No Do not refresh the page! 👍 All the best! 1 / 30 1. *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 2 / 30 2. 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 3 / 30 3. The consumptive use of water for a crop a) is measured in terms of depth of water on the irrigated area b) is measured by the volume of water per unit area c) is partly supplied by precipitation d) all of the above 4 / 30 4. *The amount of water required to fill up the pore spaces in soil particles by replacing all air held in pore spaces is known as a) filled capacity b) available moisture c) saturation capacity d) all of the above 5 / 30 5. *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 6 / 30 6. *The most efficient section of a channel is a) triangular b) rectangular c) square d) trapezoidal 7 / 30 7. Boron concentration in water for irrigation should be limited to a) 2 ppm b) 20 ppm c) 200 ppm d) 500 ppm 8 / 30 8. *Critical depth is a) the depth corresponding to critical velocity b) the maximum permissible depth of a channel c) the depth corresponding to critical flow d) any of the above 9 / 30 9. 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 10 / 30 10. Bed bars provided in a canal are made of a) cement concrete b) brick masonry c) iron rod d) both (a) and (b) above 11 / 30 11. Sediment deposit in a reservoir can be reduced by a) providing vegetal cover in the catchment area b) avoiding reservoir sites that are prolific sources of sediment c) adopting soil conservation measures in the catchment area d) all of the above 12 / 30 12. A straight or curved retaining wall with its profile gradually changing from one slope to another is called a) curtain wall b) back wall c) flarred wall d) parapet wall 13 / 30 13. A most economical section is one for which a given cross-sectional area, slope of bed, and coefficient of resistance has a) maximum wetted perimeter b) maximum discharge c) maximum depth of flow d) minimum depth of flow 14 / 30 14. 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 15 / 30 15. 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 16 / 30 16. The aqueduct or super passage type of cross drainage headworks are used when a) high flood drainage discharge is small b) high flood drainage discharge is large and short-lived c) high flood drainage discharge is large and continues for a long time d) none of the above 17 / 30 17. The main function of a distributory head regulator is a) to regulate the supply entering the distributory from the parent channel b) to control the silt entering into the distributory c) to serve as a meter for discharge measurement d) all of the above 18 / 30 18. The thickness of concrete lining, for discharge up to 200 cumecs, varies from a) 5 to 10 cm b) 10 to 15 cm c) 15 to 20 cm d) 20 to 30 cm 19 / 30 19. If there are two canals taking off from each bank of a river, then there will be a) one divide wall and one under sluice b) one divide wall and two under sluice c) two divide walls and one under sluice d) two divide walls and two under sluice 20 / 30 20. *The dead storage in a reservoir is provided to a) accumulate the soil trapped in the reservoir b) mitigate the flood c) increase the useful life period d) all of the above 21 / 30 21. The capacity of a reservoir is 50 million cubic meters, and dead storage is 12 million cubic meters. If the average volume of sediment deposition is 0.1 million cubic meters per year, then the usefulness of the reservoir will start reducing after a) 40 years b) 100 years c) 120 years d) 250 years 22 / 30 22. 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 23 / 30 23. The most desirable alignment of an irrigation canal is along a) a contour line b) the ridge line c) the valley line d) none of the above 24 / 30 24. 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 25 / 30 25. *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 26 / 30 26. 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 27 / 30 27. The average delta of a rice crop is nearly a) 30 cm b) 60 cm c) 120 cm d) 150 cm 28 / 30 28. 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 29 / 30 29. *Surface float method is used for the velocity measurement while the current meter is used for the measurement of a) discharge b) velocity c) depth d) amount of silt 30 / 30 30. *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 Your score is Share your achievement! LinkedIn Facebook Twitter 0% Restart Test Please provide your feedback. Thank you for your valuable feedback. 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