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For a smooth hump in a subcritical flow to function as a broad crested weir, the height ΔZ of the hump above the bed must satisfy which one of the following?
(E1 = Specific head upstream of the hump, Ec = Specific head at the critical" depth yc) (Neglect friction effects)
(E1 = Specific head upstream of the hump, Ec = Specific head at the critical" depth yc) (Neglect friction effects)
- a)
- b)
- c)
- d)
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
For a smooth hump in a subcritical flow to function as a broad crested...
If the flow is subcritical, then after the introduction of hump the specific energy will decrease by ΔZ (height of hump).
Most Upvoted Answer
For a smooth hump in a subcritical flow to function as a broad crested...
Explanation:
Given Parameters:
- E1 = Specific head upstream of the hump
- Ec = Specific head at the critical depth yc
Key Concept:
- For a smooth hump in a subcritical flow to function as a broad crested weir, the height ΔZ of the hump above the bed must satisfy certain conditions.
Condition for a Broad Crested Weir:
- In this case, we need to ensure that the specific energy at the upstream location (E1) is greater than the specific energy at the critical depth (Ec) for the flow to behave as a broad crested weir.
Analysis:
- The specific energy at a point is given by the sum of the depth of flow (Y) and the velocity head (V^2/2g).
- At critical depth, the specific energy is minimum and equal to the critical specific energy Ec.
- Therefore, the specific energy at the upstream location E1 must be greater than Ec for the flow to behave as a broad crested weir.
Conclusion:
- The height ΔZ of the hump above the bed must be such that the specific energy at the upstream location (E1) is greater than the specific energy at the critical depth (Ec).
- Therefore, the correct condition is ΔZ ≤ (E1 - E0), which is option 'd'.
Given Parameters:
- E1 = Specific head upstream of the hump
- Ec = Specific head at the critical depth yc
Key Concept:
- For a smooth hump in a subcritical flow to function as a broad crested weir, the height ΔZ of the hump above the bed must satisfy certain conditions.
Condition for a Broad Crested Weir:
- In this case, we need to ensure that the specific energy at the upstream location (E1) is greater than the specific energy at the critical depth (Ec) for the flow to behave as a broad crested weir.
Analysis:
- The specific energy at a point is given by the sum of the depth of flow (Y) and the velocity head (V^2/2g).
- At critical depth, the specific energy is minimum and equal to the critical specific energy Ec.
- Therefore, the specific energy at the upstream location E1 must be greater than Ec for the flow to behave as a broad crested weir.
Conclusion:
- The height ΔZ of the hump above the bed must be such that the specific energy at the upstream location (E1) is greater than the specific energy at the critical depth (Ec).
- Therefore, the correct condition is ΔZ ≤ (E1 - E0), which is option 'd'.
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For a smooth hump in a subcritical flow to function as a broad crested weir, the height ΔZ of the hump above the bed must satisfy which one of the following?(E1 = Specific head upstream of the hump, Ec=Specific head at the critical" depth yc) (Neglect friction effects)a)b)c)d)Correct answer is option 'D'. Can you explain this answer?
Question Description
For a smooth hump in a subcritical flow to function as a broad crested weir, the height ΔZ of the hump above the bed must satisfy which one of the following?(E1 = Specific head upstream of the hump, Ec=Specific head at the critical" depth yc) (Neglect friction effects)a)b)c)d)Correct answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about For a smooth hump in a subcritical flow to function as a broad crested weir, the height ΔZ of the hump above the bed must satisfy which one of the following?(E1 = Specific head upstream of the hump, Ec=Specific head at the critical" depth yc) (Neglect friction effects)a)b)c)d)Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For a smooth hump in a subcritical flow to function as a broad crested weir, the height ΔZ of the hump above the bed must satisfy which one of the following?(E1 = Specific head upstream of the hump, Ec=Specific head at the critical" depth yc) (Neglect friction effects)a)b)c)d)Correct answer is option 'D'. Can you explain this answer?.
For a smooth hump in a subcritical flow to function as a broad crested weir, the height ΔZ of the hump above the bed must satisfy which one of the following?(E1 = Specific head upstream of the hump, Ec=Specific head at the critical" depth yc) (Neglect friction effects)a)b)c)d)Correct answer is option 'D'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about For a smooth hump in a subcritical flow to function as a broad crested weir, the height ΔZ of the hump above the bed must satisfy which one of the following?(E1 = Specific head upstream of the hump, Ec=Specific head at the critical" depth yc) (Neglect friction effects)a)b)c)d)Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For a smooth hump in a subcritical flow to function as a broad crested weir, the height ΔZ of the hump above the bed must satisfy which one of the following?(E1 = Specific head upstream of the hump, Ec=Specific head at the critical" depth yc) (Neglect friction effects)a)b)c)d)Correct answer is option 'D'. Can you explain this answer?.
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