Revision Fluid Mechanics

What is the difference between a fluid and a solid?

• Fluids can flow and solids cannot

• Fluids are compressible and solids are not

• Fluids have no shear strength and solids have shear strength

• All of the above

What is the difference between incompressible and compressible fluids?

• Incompressible fluids have constant density and compressible fluids do not

• Incompressible fluids are not affected by changes in pressure and compressible fluids are

• Incompressible fluids have low viscosity and compressible fluids have high viscosity

• None of the above

What is the formula for pressure in a fluid at rest?

• P = F/A

• P = F x V

• P = ρgh

• P = ρV

Which of the following is not a factor that affects the pressure in a fluid at rest?

• Density of the fluid

• Height of the fluid

• Velocity of the fluid

What is the difference between gauge pressure and absolute pressure?

• Gauge pressure is the pressure measured relative to atmospheric pressure, while absolute pressure is the pressure measured relative to a vacuum.

• Gauge pressure is the pressure measured relative to a vacuum, while absolute pressure is the pressure measured relative to atmospheric pressure.

• Gauge pressure and absolute pressure are the same thing.

• Gauge pressure is the pressure measured relative to the fluid's density, while absolute pressure is the pressure measured relative to atmospheric pressure.

What is the principle of Pascal's Law?

• Pressure in a fluid at rest is equal in all directions.

• Pressure in a fluid at rest is inversely proportional to the area of the container.

• Pressure in a fluid at rest is directly proportional to the density of the fluid.

• Pressure in a fluid at rest is proportional to the depth of the fluid.

How does the pressure in a fluid change as the fluid flows through a constriction?

• The pressure increases.

• The pressure decreases.

• The pressure stays the same.

• The pressure fluctuates.

What is the principle of conservation of mass in the context of finite control volume analysis?

• The mass of the fluid within a control volume remains constant over time.

• The mass of the fluid within a control volume increases over time.

• The mass of the fluid within a control volume decreases over time.

• The mass of the fluid within a control volume fluctuates over time.

How is the rate of change of momentum of a fluid within a control volume related to the forces acting on the fluid?

• It is equal to the sum of the forces acting on the fluid.

• It is equal to the product of the forces acting on the fluid.

• It is inversely proportional to the forces acting on the fluid.

• It is proportional to the forces acting on the fluid.

Which of the following is not a type of flow that can be analyzed using finite control volume analysis?

• Steady flow

• Unsteady flow

• Laminar flow

• Transient flow