MCQOPTIONS
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MCQOPTIONS
This section includes 188 Mcqs, each offering curated multiple-choice questions to sharpen your Irrigation Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following formula for calculating yield can be applied to all catchments? |
| A. | Inglis formula |
| B. | Khosla’s formula |
| C. | Lacey’s formula |
| D. | Barlow’s table |
| Answer» C. Lacey’s formula | |
| 2. |
Gravity dam is most suitable when the foundation is _______________ |
| A. | weak |
| B. | strong |
| C. | with heavy overburden |
| D. | rocky but cracked |
| Answer» C. with heavy overburden | |
| 3. |
According to the Inglis formula, the non-ghat areas are the one where rainfall is _____________ |
| A. | 200 cm or more |
| B. | 200 cm or less |
| C. | 100 cm or more |
| D. | 100 cm or less |
| Answer» C. 100 cm or more | |
| 4. |
For any width of the valley with any foundation and low height of water to be stored, the best-suited dam is _____________ |
| A. | steel dam |
| B. | buttress dam |
| C. | timber dam |
| D. | solid gravity dam |
| Answer» D. solid gravity dam | |
| 5. |
The surcharge storage in a dam reservoir is the volume of water stored ________________ |
| A. | between the minimum and maximum reservoir levels |
| B. | between the minimum and normal reservoir levels |
| C. | between normal and maximum reservoir levels |
| D. | below the minimum pool level |
| Answer» D. below the minimum pool level | |
| 6. |
The outlet provided in a dam body to release water for the downstream water demand is known as ______________________ |
| A. | spillway |
| B. | sluiceway |
| C. | under-sluice |
| D. | waterway |
| Answer» C. under-sluice | |
| 7. |
Windbreakers, Integrated operation of reservoirs and Use of underground storage are all methods of ______________________ |
| A. | evaporation control |
| B. | estimation of absorption losses |
| C. | estimation of absorption losses |
| D. | estimation of reservoir leakage |
| Answer» B. estimation of absorption losses | |
| 8. |
Trap efficiency of a storage reservoir is defined as the ratio of ___________________ |
| A. | total annual sediment inflow to the reservoir capacity |
| B. | total sediment deposited in a given period to the total sediment inflow in that period |
| C. | total annual sediment deposited in the reservoir to the dead storage capacity of the reservoir |
| D. | reservoir capacity to the total annual sediment |
| Answer» C. total annual sediment deposited in the reservoir to the dead storage capacity of the reservoir | |
| 9. |
The maximum discharging capacity of a retarding reservoir should not be equal to the maximum safe carrying capacity of the channel downstream. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 10. |
A steep slope of the flow duration curve indicates a stream with _________________ |
| A. | highly variable discharge |
| B. | small variability of flow |
| C. | considerable base flow |
| D. | large flood plains |
| Answer» B. small variability of flow | |
| 11. |
Topography dictates the first choice of the type of dam. A narrow U-shaped valley would suggest a ________________________ |
| A. | concrete overflow dam |
| B. | spillway |
| C. | arch dam |
| D. | earth dam |
| Answer» B. spillway | |
| 12. |
Which reservoir is also known as Mitigation reservoir? |
| A. | Conservation reservoir |
| B. | Flood control reservoir |
| C. | Multipurpose dam |
| D. | Storage reservoir |
| Answer» C. Multipurpose dam | |
| 13. |
The only arch dam of India is Idukki dam across Periyar River in Kerala state whose height is _____ |
| A. | 81 m |
| B. | 143 m |
| C. | 149 m |
| D. | 169 m |
| Answer» E. | |
| 14. |
It is possible to construct steel dam only up to a height of ____________ |
| A. | 5 m |
| B. | 10 m |
| C. | 20 m |
| D. | 50 m |
| Answer» D. 50 m | |
| 15. |
A 2 m diameter sluiceway at RL 300 m is provided through a concrete overflow dam section to release water to the downstream where tail water level is not more than 275 m. The discharge through this outlet when the water level in the reservoir is at FRL of 330 m is of the order of_________________ |
| A. | 20 cumecs |
| B. | 40 cumecs |
| C. | 50 cumecs |
| D. | 80 cumecs |
| Answer» D. 80 cumecs | |
| 16. |
In which of the following reservoir the flood crest downstream can be better controlled and regulated properly? |
| A. | Distribution reservoir |
| B. | Multipurpose reservoir |
| C. | Storage reservoir |
| D. | Retarding reservoir |
| Answer» D. Retarding reservoir | |
| 17. |
As the height of a proposed dam is increased, the cost per unit of storage initially increases and then decreases. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 18. |
The useful storage in a dam reservoir is the volume of water stored __________________ |
| A. | between the minimum and maximum reservoir levels |
| B. | between the minimum and normal reservoir levels |
| C. | between normal and maximum reservoir levels |
| D. | below the minimum pool level |
| Answer» C. between normal and maximum reservoir levels | |
| 19. |
The bar screens used to cover the dam outlets to prevent entry of debris, or ice into the spillway conduits are called __________________ |
| A. | gate controlled ports |
| B. | projecting collars |
| C. | trash racks |
| D. | intakes |
| Answer» D. intakes | |
| 20. |
According to the Central Water Commission, the average annual evaporation loss is estimated to be _____________ |
| A. | 100 cm |
| B. | 125 cm |
| C. | 225 cm |
| D. | 250 cm |
| Answer» D. 250 cm | |
| 21. |
If 20% of the reservoir capacity is earmarked for dead storage in a storage reservoir of 30 M.cum and the average annual silt deposition in the reservoir is 0.1 M cum, then the useful life of the reservoir will start reducing after ____________ |
| A. | 60 years |
| B. | 120 years |
| C. | 240 years |
| D. | 300 years |
| Answer» B. 120 years | |
| 22. |
A reservoir having gates and valves installation at its spillway and at its sluice outlets ___________ |
| A. | storage reservoir |
| B. | retarding basin |
| C. | both storage and retarding reservoir |
| D. | distribution reservoir |
| Answer» B. retarding basin | |
| 23. |
Which of the following statement is incorrect regarding the selection of dam site? |
| A. | For economy, the length of the dam should be as small as possible |
| B. | For a given height, it should store the maximum volume of water |
| C. | The river valley at the dam site should be narrow but should open out upstream to provide a large basin for a reservoir |
| D. | The general bed level at the dam site should preferably be lower than that of the river basin |
| Answer» E. | |
| 24. |
Which of the following foundations are suitable for earthen and rock-fill dams? |
| A. | Solid rock foundation |
| B. | Gravel foundation |
| C. | Silt and fine sand foundation |
| D. | Clay foundation |
| Answer» C. Silt and fine sand foundation | |
| 25. |
A 4 m diameter tunnel has been constructed through an earthen dam with a bell mouth entry. The water levels on the U/s and D/s sides of the dam are at RL 226 m and 210 m respectively. What will be the discharge through this outlet? |
| A. | 64 cumecs |
| B. | 104 cumecs |
| C. | 165 cumecs |
| D. | 216 cumecs |
| Answer» D. 216 cumecs | |
| 26. |
The economical height of a dam is that height for which the ____________________ |
| A. | cost per unit of storage is minimum |
| B. | benefit-cost ratio is maximum |
| C. | net benefits are maximum |
| D. | benefit-cost ratio is minimum |
| Answer» B. benefit-cost ratio is maximum | |
| 27. |
The design annual rainfall for the catchment of a proposed reservoir has been computed to be 99 cm. The catchment area contributing to the proposed reservoir is 1000 sq.km having a mean annual temperature of 20°C. Calculate the annual design catchment yield for the reservoir using Khosla’s formula. |
| A. | 89.4 M.m³ |
| B. | 8.94 M.m³ |
| C. | 894 m³ |
| D. | 894 M.m³ |
| Answer» E. | |
| 28. |
The oldest dam of India is built on which river? |
| A. | Krishna River |
| B. | Kaveri River |
| C. | Damodar River |
| D. | Kallada River |
| Answer» C. Damodar River | |
| 29. |
The highest dam of India is built on _______________ |
| A. | Jhelum River |
| B. | Musi River |
| C. | Kaveri River |
| D. | Bhagirathi River |
| Answer» E. | |
| 30. |
What is the value of Lacey’s monsoon duration factor for a good year? |
| A. | 0.5 |
| B. | 1.2 |
| C. | 1.5 |
| D. | 1.8 |
| Answer» D. 1.8 | |
| 31. |
Arch dams are constructed in _____________ |
| A. | wide valleys with flat side slopes |
| B. | narrow valley with weak abutments |
| C. | moderate valleys with strong abutments |
| D. | narrow valleys with strong abutments |
| Answer» E. | |
| 32. |
Which of the following is not used as WERs? |
| A. | Hexa decanol |
| B. | Octa decanol |
| C. | Docosanol |
| D. | Cyclohexanol |
| Answer» E. | |
| 33. |
A trash rack is not required at the entrance of a ____________________ |
| A. | siphon spillway |
| B. | drum gate installation |
| C. | morning glory spillway |
| D. | high-head gate installation |
| Answer» C. morning glory spillway | |
| 34. |
River intakes is usually situated on ____________________ |
| A. | the convex side of the curve |
| B. | the concave side of the curve |
| C. | straight reach |
| D. | the downstream side of a sewer outfall |
| Answer» D. the downstream side of a sewer outfall | |
| 35. |
What is the value of head loss for the fully open gate and butterfly valves? |
| A. | 0.5 V² / 2g |
| B. | V² / 2g |
| C. | 0.2 V² / 2g |
| D. | 0.04 V² / 2g |
| Answer» D. 0.04 V² / 2g | |
| 36. |
Which of the following dam is suitable for narrow valleys? |
| A. | Arch dam |
| B. | Steel dam |
| C. | Coffer dam |
| D. | Timber dam |
| Answer» B. Steel dam | |
| 37. |
With the reduction in reservoir capacity over the passage of time, the trap efficiency ___________ |
| A. | increases |
| B. | decreases |
| C. | remains unaffected |
| D. | may increase or decrease depending upon the reservoir characteristics |
| Answer» C. remains unaffected | |
| 38. |
The transit time required by a barge tow moving upstream in a navigable river increases if the flow velocity is more. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 39. |
A special flexible joint called simplex joint is generally used to join _______________ |
| A. | vitrified clay conduits |
| B. | galvanised iron pipes |
| C. | asbestos conduits |
| D. | hume steel conduits |
| Answer» D. hume steel conduits | |
| 40. |
What is the minimum depth of water required for safe and economical navigation? |
| A. | 1 m |
| B. | 2 m |
| C. | 2.7 m |
| D. | 4.2 m |
| Answer» D. 4.2 m | |
| 41. |
Which of the following conduits is used when large diameter pipes of smaller wall thickness are required? |
| A. | Cast iron conduits |
| B. | Galvanized steel pipes |
| C. | Hume steel conduits |
| D. | Centrifugal type RCC pipe |
| Answer» C. Hume steel conduits | |
| 42. |
Wrought iron pipes are heavier than cast iron pipes and cannot be easily fabricated. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 43. |
Ships or steamers can pay to carry cargo in Indian waterways extending to about ____________________ |
| A. | 500 km |
| B. | 2500 km |
| C. | 10,000 km |
| D. | 40,000 km |
| Answer» C. 10,000 km | |
| 44. |
Which of the following pipes is used for carrying hot water in the interior of the building? |
| A. | Wrought iron pipes |
| B. | Copper pipes |
| C. | Galvanised iron pipes |
| D. | Plastic pipes |
| Answer» C. Galvanised iron pipes | |
| 45. |
The top-level of a tank weir in a tank bund scheme is kept at ________ |
| A. | Maximum Water Level (M.W.L) |
| B. | Full Tank Level (F.T.L) |
| C. | Either M.W.L or F.T.L |
| D. | Full Supply Level |
| Answer» C. Either M.W.L or F.T.L | |
| 46. |
The storage created on the upstream side of a smaller stream by the construction of low earthen bunds is technically known as _________________ |
| A. | a reservoir |
| B. | a tank |
| C. | a lake |
| D. | a pond |
| Answer» C. a lake | |
| 47. |
The belt conveyor forming an essential part of a ladder dredger used for excavating river sand deposits is used for _______________________ |
| A. | excavation of sand |
| B. | transporting excavated sand to the surface over small distances |
| C. | transporting excavated sand to the surface over large distances |
| D. | transporting excavated sand to the surface over all distances |
| Answer» C. transporting excavated sand to the surface over large distances | |
| 48. |
The rivers carrying huge sediment load can be corrected with the help of sal-balli spurs. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 49. |
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? |
| A. | 2 H : 1 V |
| B. | 1/2H : 1 V |
| C. | 2.5 H : 1V |
| D. | 1.5 H : 1 V |
| Answer» C. 2.5 H : 1V | |
| 50. |
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. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |