Fluid Mechanics Quiz

What is the definition of a fluid?

• A solid that can flow

• A substance that can deform under shear stress

• A gas that has no volume

• A liquid that cannot be compressed

Which law describes the relationship between shear stress and velocity gradient in a fluid?

• Archimedes' principle

• Pascal's law

• Bernoulli's principle

• Newton's law of viscosity

What type of fluid has a constant viscosity regardless of the shear rate?

• Ideal fluid

• Non-Newtonian fluid

• Real fluid

• Newtonian fluid

What is the primary difference between ideal and real fluids?

• Ideal fluids have viscosity, real fluids do not

• Real fluids are always in motion, ideal fluids are not

• Real fluids are incompressible, ideal fluids are not

• Ideal fluids do not exhibit viscosity, real fluids do

What does Pascal's law state?

• Pressure applied to a confined fluid is transmitted undiminished in all directions

• The pressure in a fluid decreases with depth

• The density of a fluid is constant regardless of temperature

• The velocity of a fluid increases as pressure decreases

What is the purpose of a manometer?

• To measure fluid pressure

• To measure fluid velocity

• To measure fluid density

• To measure fluid temperature

In hydrostatics, what is the center of pressure?

• The point where the pressure is highest

• The point where the total pressure acts on a surface

• The point where fluid velocity is zero

• The average pressure over a surface

What is the continuity equation in fluid dynamics?

• F = ma

• P1 + 0.5ρv1^2 + ρgh1 = P2 + 0.5ρv2^2 + ρgh2

• A1v1 = A2v2

• A = v * t

Which of the following describes a streamline?

• A line that indicates the density of a fluid

• A line that shows the velocity of a fluid

• A line of constant pressure in a fluid

• A line that represents the path of a fluid particle

What is a streak line in fluid flow?

• A line that indicates the pressure distribution in a fluid

• A line that represents the average velocity of a fluid

• A line that connects all points of a fluid at a given instant

• A line that shows the path of a single fluid particle