M3-Viscosity

What is viscosity?

• A liquid's resistance to flow.

• a liquid

• a liquids flow.

• gas to solid.

Liquids with very high viscosity flow very _______________________.

• fast

• slow

• water-loving

• none of the above

If a liquid has high viscosity, it probably has:

• strong resistance to flow

• weak resistance to flow

The best example of high viscosity would be?

• Honey

• Diluted Soap

• Water

• Wind

Consider gases, if you increase temperature, what happens to their viscosity?

• Increase

• Decrease

• No changes, viscosity is the same

Find the kinematic viscosity (stoke) of an SAE oil. The shear stress at

a point in oil is 0.2452 N/m2 and velocity gradient at that point is 0.2 per second.

• 12.5

• 15.0

• 20.5

• 23.0

A plate 0.025 mm distant from a fixed plate, moves at 60 cm/s and requires a force of

2 N per unit area, which is 2 N/m2 to maintain this speed. Determine the fluid viscosity (poise) between the plates.

• 0.83 poise

• 0.083 poise

• 0.0083 poise

• 0.00083 poise