3. Fluid Mechanics
Internal Flows — Quiz
Test your understanding of internal flows with 5 practice questions.
Practice Questions
Question 1
What is the definition of the hydraulic diameter $D_{h}$ for a non-circular duct?
Question 2
What does the hydraulic grade line (HGL) represent in a piping system?
Question 3
A pipeline consists of two segments in series: segment 1 is 50 m long and segment 2 is 100 m long. Both have diameter $D=0.1\,$m, friction factor $f=0.02$, and flow velocity $V=2\,$m/s. What is the total head loss $h_{f,tot}$?
Question 4
For fully developed laminar flow in a circular pipe, the Darcy friction factor $f$ is given by $f=64/\mathrm{Re}$. What is $f$ when $\mathrm{Re}=1200$?
Question 5
Which equation implicitly relates the friction factor $f$, Reynolds number $\mathrm{Re}$, and relative roughness $\varepsilon/D$ in turbulent flow?