1. Aerodynamics

Airflow Basics — Quiz

Test your understanding of airflow basics with 5 practice questions.

Practice Questions

Question 1

Which equation expresses the differential form of mass continuity for a compressible fluid?

Question 2

An aircraft flies at 230 m/s at an altitude where the speed of sound is 295 m/s. What is the Mach number and flow regime?

Question 3

Calculate the kinematic viscosity $\nu$ for air given $\mu=1.8\times10^{-5}\,\mathrm{Pa\cdot s}$ and $\rho=1.2\,\mathrm{kg/m^3}$.

Question 4

What is the Reynolds number for airflow with $\rho=1.225\,\mathrm{kg/m^3}$, $V=80\,\mathrm{m/s}$, characteristic length $L=0.5\,\mathrm{m}$, and $\mu=1.8\times10^{-5}\,\mathrm{Pa\cdot s}$?

Question 5

For supersonic flow ($M>1$), how does a divergent duct section (increasing area) affect the flow velocity?