Fluid Mechanics Quiz

What is surface tension?

• The tension of the surface film of a liquid

• The temperature of a liquid

• The weight of a liquid

• The pressure exerted by a gas

What is the SI unit of surface tension?

• Pascal

• Dyne per centimeter

• Joule

• Newton per meter

What does viscosity measure?

• The density of a fluid

• The resistance of a fluid to flow

• The temperature of a fluid

• The pressure of a fluid

What is a Newtonian fluid?

• A fluid that does not flow

• A fluid where shear stress is proportional to the rate of strain

• A fluid with constant density

• A fluid with no viscosity

What happens to the viscosity of gases with an increase in temperature?

• It decreases

• It remains constant

• It becomes zero

• It increases

What is an ideal fluid?

• A fluid with high viscosity

• A fluid with zero viscosity

• A fluid that is incompressible

• A fluid that flows slowly

What is the relationship described by Newton's viscosity law?

• Shear stress is proportional to velocity gradients

• Pressure is proportional to volume

• Mass is proportional to acceleration

• Temperature is proportional to density

What is the unit of dynamic viscosity?

• m2/s

• kg/(m.s)

• N/m

• m/s

What is the term for the difference in velocity along with the distance between adjacent layers of fluid?

• Density gradient

• Velocity gradient

• Pressure gradient

• Temperature gradient

What are real fluids characterized by?

• No shear resistance

• Constant density

• Possessing viscosity

• High compressibility