Master Fluid Mechanics Fundamentals: Online Quizzes and Study Guide

Question 1

Which of the following is NOT a fundamental property of fluids?

Accepted Answer

Elasticity

Answer

Density

Answer

Viscosity

Answer

Compressibility

Question 2

What is the primary purpose of the Reynolds number?

Accepted Answer

To indicate the relative significance of inertial forces to viscous forces

Answer

To calculate the ratio of fluid velocity to pipe diameter

Answer

To determine the pressure drop in a pipe

Answer

To measure the fluid's density

Question 3

Which property of a fluid measures its resistance to shear forces?

Accepted Answer

Viscosity

Answer

Density

Answer

Elasticity

Answer

Thermal conductivity

Question 4

The lift force generated by an aircraft wing is primarily due to:

Accepted Answer

The pressure difference between the upper and lower surfaces of the wing

Answer

The shape of the wing

Answer

The kinetic energy of the air flowing over the wing

Answer

The density of the air

Question 5

The Reynolds number is a dimensionless parameter used to determine whether flow is laminar or turbulent. What is the unit of Reynolds number?

Accepted Answer

Dimensionless

Answer

Pa

Answer

m

Answer

Ns/m²

Question 6

Which device is commonly used to measure fluid velocity?

Accepted Answer

Pitot tube

Answer

Strain gauge

Answer

Load cell

Answer

Thermometer

Question 7

Which set of equations governs fluid motion?

Accepted Answer

Navier-Stokes equations

Answer

Maxwell's equations

Answer

Schrödinger equation

Answer

Einstein's field equations

Question 8

Which boundary condition represents a no-slip condition at a surface?

Accepted Answer

Velocity is zero at the surface (v = 0)

Answer

Velocity gradient normal to the surface is zero (∂v/∂n = 0)

Answer

Pressure is zero at the surface (p = 0)

Answer

Temperature is zero at the surface (T = 0)

Question 9

In a stationary fluid, pressure at any point is:

Accepted Answer

Constant in all directions

Answer

Decreases with elevation

Answer

Increases with temperature

Question 10

Which device measures pressure difference between two points in a fluid?

Accepted Answer

Manometer

Answer

Thermocouple

Answer

Anemometer

Question 11

Mass flow rate of a fluid through a pipe is given by:

Accepted Answer

ρAV

Answer

AV/ρ

Answer

V/ρA

Question 12

The SI unit of dynamic viscosity is:

Accepted Answer

Pa·s

Answer

N/m²

Question 13

The dimensionless number used to characterize flow regimes in pipes is:

Accepted Answer

Reynolds number

Answer

Froude number

Question 14

Laminar flow is characterized by:

Accepted Answer

Smooth, orderly fluid motion

Answer

Irregular, chaotic fluid motion

Question 15

What force acts upwards on an object submerged in a fluid, opposing its weight?

Accepted Answer

Buoyancy force

Answer

Drag force

Answer

Centrifugal force

Answer

Gravitational force

Question 16

In fluid mechanics, which dimensionless parameter is used to describe the flow regime in open channels?

Accepted Answer

Froude number

Answer

Reynolds number

Answer

Mach number

Answer

Weber number

Question 17

Which of the following is a defining characteristic of fluids?

Accepted Answer

They conform to the shape of their container

Answer

They have a definite volume

Answer

They are highly compressible

Answer

They exhibit elastic properties

Question 18

The pressure exerted by a fluid at a specific point is calculated as:

Accepted Answer

The force acting per unit area

Answer

The change in pressure per unit distance

Answer

The rate of change of pressure over time

Answer

The mass of the fluid per unit volume

Question 19

Which type of fluid flow is characterized by irregular and chaotic motion?

Accepted Answer

Turbulent flow

Answer

Laminar flow

Answer

Steady flow

Answer

Unsteady flow

Question 20

The Bernoulli equation establishes a relationship between:

Accepted Answer

Pressure, velocity, and height

Answer

Force, mass, and acceleration

Answer

Stress, strain, and temperature

Answer

Energy, momentum, and volume

Question 21

Viscosity is a property of fluids that describes their:

Accepted Answer

Resistance to flow

Answer

Ability to compress

Answer

Mass per unit volume

Answer

Thermal conductivity

Question 22

Which fluid property is most influential in determining its resistance to flow?

Accepted Answer

Viscosity

Answer

Density

Answer

Surface tension

Answer

Thermal conductivity

Question 23

Which type of fluid flow is characterized by smooth, parallel layers and constant velocity?

Accepted Answer

Laminar flow

Answer

Turbulent flow

Answer

Viscous flow

Answer

Compressible flow

Question 24

The dimensionless parameter that quantifies the relative significance of inertial and viscous forces is the:

Accepted Answer

Reynolds number

Answer

Mach number

Answer

Froude number

Answer

Weber number

Question 25

Which device converts kinetic energy of a fluid into pressure energy?

Accepted Answer

Nozzle

Answer

Pump

Answer

Turbine

Answer

Venturi meter