Practice Average Velocity And Discharge Calculations (3.5) - Laminar and Turbulent Flow (Contnd.)

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9 questions

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4 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the formula for calculating average velocity?
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Think about flow rate and area.
Question 2.
What does the Reynolds number indicate?
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Consider its threshold values.
3Question 3.
What is the critical Reynolds number for laminar flow?
- 1000
- 2000
- 2500
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Consider common thresholds for flow types.
4Question 4.
The average velocity in laminar flow is directly proportional to which of the following?
- True
- False
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Review relationships between variables.
Question 5.
A fluid of specific gravity 0.9 and viscosity 0.6 Pa·s flows through a 100mm diameter pipe. Calculate the average velocity if the flow rate is 0.1 m³/s.
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You need to derive the area from the diameter first.
Question 6.
Determine the pressure drop across a 25m length of pipe with viscosity of 0.8 Pa·s and experiencing an average flow velocity of 0.5 m/s, with the diameter given as 50mm.
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Look to apply the Darcy-Weisbach equation if familiar.

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