Fluid Mechanics 1

What is the branch of mechanics that deals with bodies at rest?

• Hydrodynamics

• Statics

• Fluid mechanics

• Dynamics

Which term describes the flow of fluids that undergo significant density changes?

• Hydraulics

• Gas dynamics

• Hydrodynamics

• All are true

What is the term for the force per unit area acting on a surface?

• Stress

• Pressure

• Normal force

• Shear force

What type of flow is characterized by smooth layers of fluid?

• Turbulent flow

• Transitional flow

• Forced flow

• Laminar flow

What is the term for the rise or fall of a liquid in a small-diameter tube?

• Viscosity

• Hydrodynamics

• Capillary effect

• Surface tension

Which property represents the internal resistance of a fluid to motion?

• Specific gravity

• Pressure

• Viscosity

• Density

What is the term for the temperature at which a pure substance changes phase at a given pressure?

• Saturation temperature

• Density

• Vapor pressure

• Specific weight

What is the ratio of the actual speed of the fluid to the speed of sound in the same fluid called?

• Mach number

• Reynolds number

• Velocity ratio

• Pressure ratio

Which type of flow occurs when a fluid is forced to flow by external means?

• Steady flow

• Inviscid flow

• Forced flow

• Natural flow

What is the term for the tangential component of a force acting on a surface per unit area?

• Shear stress

• Cohesive stress

• Pressure

• Normal stress