Quiz (Week 3)

How can the viscosity of gas and liquid be estimated?

• By guesswork

• By trial and error

• By experimental methods

• By theoretical calculations

What is the reduced viscosity μr?

• p/pc

• T/Tc

• μc/μ

• μ/μc

How does the viscosity of a gas at low density change with temperature?

• Remains constant

• No effect

• Increases

• Decreases

What is convective transport in momentum transport?

• Temperature dependence

• Pressure dependence

• Molecular transport only

• Bulk flow of the fluid

What is the momentum flux across a shaded area?

• ρv/vx

• vx

• ρv

• vxρv

What does the combined momentum flux consist of?

• Viscosity and velocity gradients

• Density and velocity components

• Pressure and temperature

• Molecular momentum flux and convective momentum flux

What is the viscosity of a liquid at high temperature?

• No effect

• Decreases

• Increases

• Remains constant

What is the viscosity of a gas at high density?

• No effect

• Increases

• Remains constant

• Decreases

What is the momentum flux across a shaded area?

• ρv/vx

• vxρv

• ρv

• vx

What is the viscosity of a liquid at low temperature?

• No effect

• Remains constant

• Decreases

• Increases