Fluid Mechanics Quiz

Which of the following best defines a fluid?

• A substance that cannot be compressed

• A substance that flows and conforms to the shape of its container

• A substance with a fixed shape and volume

• A substance that resists shear stress

What is the unit of mass density?

• kg/m³

• kg/m²

• kg/m

• kg/s

In a static fluid, how does pressure vary with depth?

• Linearly increases with depth

• Remains constant

• Decreases with depth

• Varies inversely with depth

What is the pressure at a depth hhh in a fluid of density ρ under gravity ggg?

• P=ρgh

• P=ρgh

• P=ρh/g

• P=g/(ρh)

Pascal's Principle states that:

• Pressure applied to a confined fluid is transmitted undiminished throughout the fluid

• The pressure in a fluid decreases with depth

• The buoyant force on a submerged object equals the weight of the object

• The flow rate of a fluid is inversely proportional to its viscosity

According to Archimedes' Principle, the buoyant force on a submerged object is:

• Equal to the object's weight

• Equal to the weight of the fluid displaced

• Greater than the object's weight

• Less than the weight of the fluid displaced

A hydraulic lift operates based on which principle?

• Bernoulli's Principle

• Archimedes' Principle

• Pascal's Principle

• Newton's Second Law

The flow rate QQQ of a fluid is given by:

• Q=A×v

• Q=ρ×v

• Q=ρ×A

• Q=ρ×A×v

In fluid dynamics, the continuity equation implies:

• The flow rate decreases with increasing pipe diameter

• The product of cross-sectional area and velocity remains constant for incompressible flow

• Pressure remains constant throughout the flow

• Density remains constant in all types of flow

Bernoulli's Equation is based on the conservation of:

• Mass

• Momentum

• Energy

• Pressure