Fluid Dynamics Quiz

Which of the following scenarios best illustrates a Newtonian fluid in motion?

• Honey flowing out of a jar, changing viscosity with temperature

• Water flowing steadily through a pipeline at constant velocity

• Ketchup remaining in the bottle until squeezed

• A river’s turbulent flow over rocks

What would likely happen to an ideal fluid if subjected to extreme pressure?

• It would compress significantly

• It would change its viscosity

• It would remain incompressible

• It would become a Newtonian fluid

A fluid is moving through a pipe with a varying cross-section. If the velocity increases at a constriction, what happens to the pressure according to Bernoulli’s principle?

• Increases

• Decreases

• Remains constant

• Becomes zero

Which of the following best explains why non-Newtonian fluids behave differently from Newtonian fluids?

• Their shear stress is directly proportional to shear strain

• Their viscosity remains constant regardless of applied force

• Their viscosity changes depending on the applied shear force

• They always behave like gases

Why is laminar flow preferred over turbulent flow in fluid transport systems?

• It allows for better mixing of fluids

• It minimizes energy loss due to friction

• It ensures uniform heating of fluids

• It increases fluid velocity

A scientist is observing the flow of blood in capillaries and notices that it follows smooth, parallel layers. What type of fluid flow is this?

• Turbulent flow

• Steady flow

• Laminar flow

• Unsteady flow

If the flow of a fluid is non-uniform, what does it mean?

• The velocity remains constant at every point

• The velocity varies at different points in the flow field

• The fluid is incompressible

• The fluid follows smooth parallel layers

Which statement correctly describes compressible fluid flow?

• The density of the fluid remains unchanged

• The fluid flow is always turbulent

• The density of the fluid changes significantly along the flow path

• It only occurs in open-channel flow

In which of the following cases is an open-channel flow observed?

• Water flowing through a closed pipeline

• Air moving through a compressor

• A river flowing downstream

• Fuel being pumped through an aircraft engine

Why do engineers design pipelines to maintain laminar flow instead of turbulent flow?

• To increase turbulence for better mixing

• To reduce frictional losses and increase efficiency

• To prevent compressibility effects

• To ensure uniform density