ENG1001B T2 Week 2 Tutorial

What kind of fluid flow is smooth and predictable?

• turbulent

• laminar

• viscous

• inviscid

The fluid flow in the picture is...

• uniform

• non-uniform

• inviscid

• laminar

• turbulent

The fluid in this picture is...

• steady

• unsteady

• uniform

• turbulent

• transitional

A sample of water is transported in a sealed container at a fixed temperature from the Earth to the moon. Which of its properties is altered?

• mass

• density

• specific weight

• viscosity

• specific gravity

Newtonian fluids have (a)   dynamic viscosity.

You're told that a fluid is steady. In this case, its streamlines and streaklines are

• perpendicular

• coincident

• ill-defined

• the same as the pathlines

What are the SI unit(s) of the Reynolds number?

•  $\mathrm{kg\cdot s}$  

•  $\mathrm{kg\cdot m^{-1}\cdot s}^{-1}$  

• unitless

•  $\mathrm{N\cdot m^{-2}}$  

You're told that the Reynolds number of a pipe flow is 2300. What state is the fluid likely to be in?

• at rest

• laminar

• transitional

• turbulent

The Reynolds number signifies the ratio of

• gravity forces to viscous forces

• inertial forces to buoyant forces

• inertial forces to viscous forces

• pressure forces to viscous forces