5.11 Bernoulli principle Quiz

What is flow a measure of in fluid dynamics?

• The mass of fluid that flows per unit of time

• The force applied on an area by the fluid

• The volume of fluid that flows per unit of time

• How quickly the fluid is moving

What units are used to measure mass flow rate?

• Litres per minute

• N mm^-2 or Pa

• m s^-1

• kg s^-1

Flow velocity refers to:

• The volume of fluid that flows per unit of time

• The mass of fluid passing a point in a system per unit of time

• How quickly the fluid is moving

• The force applied on an area by the fluid

Pressure in the context of fluid dynamics is a measure of:

• The volume of fluid that flows per unit of time

• The mass of fluid passing a point in a system per unit of time

• How quickly the fluid is moving

• Force applied on an area

What happens to most materials and gases when they are squeezed?

• They occupy a larger volume and become less dense.

• They occupy the same volume but change in temperature.

• They occupy a smaller volume and become denser.

• They change in chemical composition.

What is viscosity a measure of in a fluid?

• Its resistance to pressure.

• Its resistance to temperature changes.

• Its resistance to deformation at a given rate.

• Its resistance to chemical reactions.

Which of the following substances is NOT mentioned as highly viscous in the learning material?

• Water

• Oil

• Glycerin

• Tar

What type of fluid does an ideal hydraulic system use?

• Compressible fluid

• Incompressible fluid

• Fluid with variable density

• Gas

What happens to the volume of an incompressible fluid when the pressure is increased?

• The volume increases.

• The volume decreases.

• The volume stays the same.

• The volume fluctuates unpredictably.

What is a characteristic of an incompressible fluid in terms of density?

• The density decreases when pressure increases.

• The density increases when pressure increases.

• The density does not change when the pressure changes.

• The density is not related to pressure.