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Irrigation Engineering Practice Test: River Navigation & Tank Irrigation
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River Navigation & Tank Irrigation topics include: Navigable waterways requirements, tank irrigation, tank or surplus escape weirs design. Tank irrigation is a surface irrigation method that uses tanks, sluices, and channels to direct water to crops. Tanks are small reservoirs that have been used for irrigation in India since ancient times. There are two types of tanks: System tanks: Receive water from nearby streams or reservoirs and runoff from their catchment. Non-system tanks: Depend on rainfall and are not connected to a river system.  Tank irrigation is a storage irrigation method,... Show more
Irrigation Engineering Practice Test: River Navigation & Tank Irrigation
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25 Questions

1. The dredger which excavates sand deposits of a river and discharges the excavated material with water over long distances is called a _________________
2. The usual difference between F.T.L and M.T.L is rarely allowed to exceed _____________
3. What is the minimum depth of water required for safe and economical navigation?
4. The alignment of the waterway should be________________
5. Which of the following dredger is not suitable for rocky or boulder river reaches?
6. The width of the horizontal floors of type A and D weirs from the foot of the drop wall to the d/s edge of the floor should never be less than ________________
7. Calculate peak discharge for a combined catchment of a tank forming a constituent unit of a group with the following given data –
Ryve’s coefficient intercepted = 1.8
8. The discharge through the sluice of a small irrigation tank is usually controlled by _______________
9. The storage created on the upstream side of a smaller stream by the construction of low earthen bunds is technically known as _________________
10. The provision of suitable breaching sections becomes more important in irrigation tanks which are isolated.
11. The rivers carrying huge sediment load can be corrected with the help of sal-balli spurs.
12. What will the discharging capacity of a masonry waste weir of 55 m length and 1.5 m width provided in an earthen bund for passing a flood with 1.2 m water depth over its crest?
13. The cubic meters of water that can be stored in an irrigation tank between full tank level and sill level of the lowest supply sluice is known as __________________
14. What is the approximate value of side slope of the bund for smaller tanks with water depths not exceeding 2.5 m in favorable soils such as red and white gravel, red and black loams?
15. The depth of water stored in an irrigation tank rarely exceeds ______________
16. Pipe sluices are generally not adopted in tank bunds where the depth below F.T.L exceeds ____________
17. Which of the following type of tank weirs are provided with a number of vertical steps instead of horizontal or sloping downstream apron?
18. The belt conveyor forming an essential part of a ladder dredger used for excavating river sand deposits is used for _______________________
19. What is the oldest and cheapest mode of transporting cargo?
20. The capacity of an irrigation tank is sometimes increased by installing a temporary stone wall over the top of the tank weir. This fixture is known as____________________
21. Ships or steamers can pay to carry cargo in Indian waterways extending to about ____________________
22. The fuel consumption in water transport decreases as the depth of water between the bottom of the ship and the bottom of the river increases.
23. Lock and dams constructions for creation of a series of slack-water pools along a river for promoting its navigability is adopted only when ________________________
24. The transit time required by a barge tow moving upstream in a navigable river increases if the flow velocity is more.
25. If A1 represents the area of a tank bed at bottom and A2 is the area of the tank at F.T.L, then the storage capacity of the tank of height H is given as ________________________

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