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Provision of sufficient freeboard eliminates _____
i. Over-topping failure
ii. Erosion of U/s face
iii. Erosion of D/s face
iv. Cracking due to frost action
v. Gully formation
Which of the following is/are correct?
i. Over-topping failure
ii. Erosion of U/s face
iii. Erosion of D/s face
iv. Cracking due to frost action
v. Gully formation
Which of the following is/are correct?
- a)i and v
- b)ii and iii
- c)iv and v
- d)i and iv
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Provision of sufficient freeboard eliminates _____i. Over-topping fail...
Over-topping of the dam generally occurs due to insufficient free-board, inadequate spillway capacity, and clogging of the spillway, etc. Frost causes heaving and cracking of the soil with seepage and consequent failure, an additional freeboard allowance of about 1.5 m should be provided as an additional safety measure.
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Provision of sufficient freeboard eliminates _____i. Over-topping fail...
Importance of Sufficient Freeboard in Preventing Failures
Over-topping failure and erosion of upstream (U/S) and downstream (D/S) faces are common issues that can occur in structures like dams, levees, and embankments. Providing sufficient freeboard, which is the vertical distance between the water level and the top of the structure, can help prevent these failures.
Explanation of Correct Answer
i) Over-topping failure: When the water level exceeds the height of the structure, it can lead to over-topping failure, causing damage and potential collapse. Sufficient freeboard acts as a buffer, reducing the risk of over-topping.
iv) Cracking due to frost action: In colder climates, frost action can cause the ground to freeze and expand, leading to cracking in the structure. By providing ample freeboard, the structure is less susceptible to these frost-related issues.
Conclusion
In conclusion, the correct answer is option D (i and iv), as providing sufficient freeboard can help prevent over-topping failure and cracking due to frost action. This demonstrates the importance of considering freeboard in the design and construction of hydraulic structures to ensure their stability and longevity.
Over-topping failure and erosion of upstream (U/S) and downstream (D/S) faces are common issues that can occur in structures like dams, levees, and embankments. Providing sufficient freeboard, which is the vertical distance between the water level and the top of the structure, can help prevent these failures.
Explanation of Correct Answer
i) Over-topping failure: When the water level exceeds the height of the structure, it can lead to over-topping failure, causing damage and potential collapse. Sufficient freeboard acts as a buffer, reducing the risk of over-topping.
iv) Cracking due to frost action: In colder climates, frost action can cause the ground to freeze and expand, leading to cracking in the structure. By providing ample freeboard, the structure is less susceptible to these frost-related issues.
Conclusion
In conclusion, the correct answer is option D (i and iv), as providing sufficient freeboard can help prevent over-topping failure and cracking due to frost action. This demonstrates the importance of considering freeboard in the design and construction of hydraulic structures to ensure their stability and longevity.
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Provision of sufficient freeboard eliminates _____i. Over-topping failureii. Erosion of U/s faceiii. Erosion of D/s faceiv. Cracking due to frost actionv. Gully formationWhich of the following is/are correct?a)i and vb)ii and iiic)iv and vd)i and ivCorrect answer is option 'D'. Can you explain this answer?
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