Fluid Mechanics: Concepts and Applications - Master Your Fundamentals

Question 1

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

Accepted Answer

Rigidity

Answer

Density

Answer

Viscosity

Answer

Surface tension

Question 2

The primary focus of fluid mechanics is on the behaviour of:

Accepted Answer

Fluids

Answer

Solids

Answer

Gases

Answer

Liquids

Question 3

The density of a fluid is defined as:

Accepted Answer

Mass per unit volume

Answer

Weight per unit volume

Answer

Specific gravity

Answer

Kinematic viscosity

Question 4

Which of the following statements best describes viscosity?

Accepted Answer

Resistance of a fluid to shear forces

Answer

Tendency of a fluid to flow easily

Answer

Measure of fluid's thickness

Answer

Viscosity is independent of temperature

Question 5

The surface tension of a fluid is primarily caused by:

Accepted Answer

Cohesive forces between fluid molecules

Answer

Adhesive forces between fluid and container molecules

Answer

Gravitational forces

Answer

Electrostatic forces

Question 6

Which of the following is NOT a type of fluid flow pattern?

Accepted Answer

Reciprocating

Answer

Laminar

Answer

Turbulent

Answer

Steady

Question 7

The Bernoulli equation is applicable to:

Accepted Answer

Incompressible, inviscid fluids

Answer

Compressible, viscous fluids

Answer

All fluids

Answer

Only gases

Question 8

Which of the following fluid properties is a scalar quantity?

Accepted Answer

Density

Answer

Viscosity

Answer

Pressure

Answer

Velocity

Question 9

The ratio of inertial forces to viscous forces in fluid flow is known as the:

Accepted Answer

Reynolds number

Answer

Mach number

Answer

Froude number

Answer

Weber number

Question 10

What fundamental difference exists between a liquid and a gas?

Accepted Answer

Liquids possess a definite volume, unlike gases

Answer

Liquids can flow, whereas gases cannot

Answer

Gases can be compressed, but liquids cannot

Answer

Liquids have higher densities than gases

Question 11

Fluid pressure at a given point is defined as:

Accepted Answer

Force per unit area exerted by the fluid

Answer

Weight of the fluid above the point

Answer

Sum of normal forces acting on the point

Answer

Difference between hydrostatic and dynamic pressures

Question 12

Which property is NOT fundamental to fluids?

Accepted Answer

Elasticity

Answer

Density

Answer

Viscosity

Answer

Temperature

Question 13

Fluid pressure at a specific point is defined as:

Accepted Answer

Force exerted perpendicularly on a unit surface area

Answer

Rate of change in momentum with respect to time

Answer

Work done by the fluid per unit volume

Answer

Product of fluid density and gravity

Question 14

The principle of mass conservation is expressed by:

Accepted Answer

Equation of continuity

Answer

Equation of motion

Answer

Energy equation

Answer

Bernoulli equation

Question 15

Fluid dynamics encompasses the study of:

Accepted Answer

Fluids in motion

Answer

Fluids at rest

Answer

Fluid properties

Answer

Fluid flow in pipes

Question 16

Viscosity quantifies a fluid's:

Accepted Answer

Resistance to flow

Answer

Density

Answer

Compressibility

Answer

Surface tension

Question 17

The primary focus of fluid mechanics is the analysis of:

Accepted Answer

Fluid flow and forces exerted by fluids

Answer

Fabrication of fluid handling components

Answer

Design of hydraulic systems

Question 18

Which branch of fluid mechanics deals with the study of fluids at rest?

Accepted Answer

Fluid statics

Answer

Fluid dynamics

Answer

Compressible flow

Answer

Fluid kinematics

Question 19

Fluid kinematics primarily focuses on:

Accepted Answer

Describing fluid motion without considering forces

Answer

Analyzing fluid forces on immersed bodies

Answer

Predicting fluid flow patterns

Question 20

An example of a practical application of fluid dynamics in engineering is:

Accepted Answer

Designing aircraft wings

Answer

Analyzing laminar flow

Answer

Measuring fluid pressure

Answer

Storing liquids in tanks

Question 21

The key difference between Newtonian and non-Newtonian fluids lies in their:

Accepted Answer

Variation of viscosity with shear rate

Answer

Variation of density with temperature

Answer

Variation of compressibility with pressure

Question 22

Which dimensionless parameter is commonly used to characterize fluid flow behavior?

Accepted Answer

Reynolds number

Answer

Poisson's ratio

Answer

Gravitational constant

Answer

Specific heat capacity

Question 23

The purpose of using boundary conditions in fluid mechanics is to:

Accepted Answer

Specify constraints on fluid behavior at specific locations or surfaces

Answer

Simplify fluid flow equations

Answer

Improve computational efficiency

Question 24

Laminar flow is a type of:

Accepted Answer

Fluid flow regime

Answer

Plastic flow

Answer

Elastic flow

Answer

Viscous flow

Question 25

The fundamental equations governing fluid flow are known as the:

Accepted Answer

Navier-Stokes equations

Answer

Euler equations

Answer

Bernoulli equation

Answer

Darcy-Weisbach equation