Fluid Dynamics Multiple Choice Questions

1. Which equation represents the conservation of mass in fluid dynamics?
a) Bernoulli’s equation
b) Navier-Stokes equation
c) Continuity equation
d) Euler’s equation


2. Which of the following assumptions is NOT made in Bernoulli’s equation?
a) The fluid is incompressible
b) The fluid flow is steady
c) The fluid has viscosity
d) The flow is along a streamline


3. The Reynolds number is used to determine whether a flow is:
a) Steady or unsteady
b) Viscous or inviscid
c) Laminar or turbulent
d) Rotational or irrotational


4. What is the main cause of lift in an airplane wing based on fluid dynamics?
a) Higher pressure above the wing than below
b) Equal pressure on both sides of the wing
c) Lower pressure above the wing than below
d) No pressure difference across the wing


5. Which principle explains why a faster-moving fluid exerts lower pressure?
a) Pascal’s principle
b) Archimedes’ principle
c) Bernoulli’s principle
d) Torricelli’s theorem



Answers:

1. c) Continuity equation
2. c) The fluid has viscosity
3. c) Laminar or turbulent
4. c) Lower pressure above the wing than below
5. c) Bernoulli’s principles