Practice Critical Velocity Concept (47.2.3) - Kennedy’s and Lacey’s Theory of Regime Channels

Practice: Critical Velocity Concept

Lesson 47.2.3Kennedy’s and Lacey’s Theory of Regime Channels

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9 questions

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6 sample questions

Question 1.
What is critical velocity?
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Think about why water flows in a channel.
Question 2.
What does the depth of flow affect?
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Consider the formula that relates depth to velocity.
3Question 3.
What is the formula for critical velocity (Vc)?
- Vc = 0.55·D^0.64
- Vc = 0.75·D^0.45
- Vc = D^0.64
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Think about the components in the context of flow.
4Question 4.
True or False: Higher sediment sizes require lower velocities to remain in suspension.
- True
- False
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Recall the critical velocity ratio concept.
Question 5.
A channel has a flow depth of 4 meters. Calculate the critical velocity. Discuss the implications of not maintaining this speed.
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Apply the formula carefully considering flow depth.
Question 6.
If the sediment is a mix with a ratio of m = 1.2, what does this indicate about the required critical velocity compared to normal? Provide reasoning.
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Relate it back to the original formula and effects of sediment type.

5 more questions in this section. Enroll free to practise them all.