Fluids and Their Properties: Interactive Learning Quizzes

Question 1

Define a fluid.

Accepted Answer

A substance that can flow

Answer

A substance with a definite volume

Answer

A substance that cannot be compressed

Answer

A substance that has a definite shape

Question 2

Which unit is NOT used to measure viscosity?

Accepted Answer

Decibel

Answer

Pascal-seconds

Answer

Poise

Answer

Reyn

Question 3

What does surface tension measure?

Accepted Answer

Cohesive forces between fluid molecules

Answer

Adhesive forces between fluid and solid molecules

Answer

Gravitational pull on a fluid

Answer

Elasticity of a fluid

Question 4

Specific weight is defined as:

Accepted Answer

Weight of the fluid per unit volume

Answer

Density of the fluid multiplied by its specific gravity

Answer

Mass of the fluid per unit volume

Answer

Force exerted by the fluid per unit area

Question 5

What is the study of fluid motion at rest called?

Accepted Answer

Hydrostatics

Answer

Hydrodynamics

Answer

Rheology

Answer

Tribology

Question 6

What force is responsible for the tendency of liquid molecules to stick together at their surface?

Accepted Answer

Surface tension

Answer

Density

Answer

Viscosity

Answer

Vapor pressure

Question 7

A fluid that deviates from Newton's law of viscosity is called a:

Accepted Answer

Non-Newtonian fluid

Answer

Newtonian fluid

Answer

Ideal fluid

Answer

Real fluid

Question 8

Which factors primarily determine the viscosity of a fluid?

Accepted Answer

Temperature and pressure

Accepted Answer

Fluid composition

Answer

Flow velocity

Question 9

How do the strengths of intermolecular forces between molecules affect the surface tension of liquids?

Accepted Answer

Stronger intermolecular forces result in higher surface tension.

Answer

Stronger intermolecular forces result in lower surface tension.

Answer

The strength of intermolecular forces does not affect surface tension.

Answer

Higher surface tension is always caused by weaker intermolecular forces.

Question 10

The SI unit of density, which expresses the mass of a substance per unit volume, is:

Accepted Answer

kilograms per cubic meter (kg/m³)

Answer

newtons per square meter (N/m²)

Answer

pascals per second (Pa·s)

Answer

joules per kilogram (J/kg)

Question 11

Which fluid property describes its resistance to flow?

Accepted Answer

Viscosity

Answer

Density

Answer

Surface tension

Answer

Vapor pressure

Question 12

The force acting perpendicular to the surface of a fluid due to molecular cohesion, which causes the surface to behave like a stretched elastic membrane, is known as:

Accepted Answer

Surface tension

Answer

Density

Answer

Viscosity

Answer

Capillarity

Question 13

Which of the following factors affects the vapor pressure of a fluid, the pressure exerted by its vapor?

Accepted Answer

Temperature

Answer

Volume

Answer

Viscosity

Answer

Surface tension

Question 14

A fluid with a higher density has:

Accepted Answer

More mass per unit volume

Answer

Less mass per unit volume

Answer

Equal mass per unit volume

Answer

Cannot be determined

Question 15

Which of the following is a type of fluid flow where the velocity at any point in the fluid is constant, with no fluctuations or turbulence?

Accepted Answer

Laminar flow

Answer

Turbulent flow

Answer

Viscous flow

Answer

Inviscid flow

Question 16

Fluid density is defined as:

Accepted Answer

Mass per unit volume

Answer

Volume per unit mass

Answer

Force per unit area

Answer

Pressure per unit volume

Question 17

Which of the following fluids typically exhibits the highest viscosity?

Accepted Answer

Honey

Answer

Water

Answer

Air

Answer

Mercury

Question 18

Surface tension in fluids is primarily attributed to:

Accepted Answer

Cohesive forces between molecules

Answer

Adhesive forces between molecules

Answer

Gravitational forces

Answer

Electrostatic forces

Question 19

Vapor pressure is the pressure exerted by:

Accepted Answer

A liquid when in equilibrium with its vapor

Answer

A gas when in equilibrium with its liquid

Answer

A solid when in equilibrium with its gas

Answer

A liquid when in equilibrium with its solid

Question 20

Which of the following is **not** an example of a real fluid?

Accepted Answer

Ideal gas

Answer

Water

Answer

Air

Answer

Honey

Question 21

Fluid viscosity can be measured using various techniques. Which of the following is **not** a common method?

Accepted Answer

Acoustic viscometer

Answer

Capillary viscometer

Answer

Orifice viscometer

Answer

Rotating viscometer

Question 22

Which of the following fluids is considered Newtonian?

Accepted Answer

Water

Answer

Blood

Answer

Honey

Answer

Toothpaste

Question 23

The density of a fluid is defined as its:

Accepted Answer

Mass per unit volume

Answer

Volume per unit mass

Answer

Pressure per unit area

Answer

Viscosity per unit temperature

Question 24

Which factor does not affect fluid viscosity?

Accepted Answer

Altitude

Answer

Temperature

Answer

Shear rate

Answer

Fluid composition

Question 25

Surface tension is primarily caused by:

Accepted Answer

Cohesive forces between fluid molecules

Answer

Adhesive forces between fluid and container

Answer

Gravitational forces acting on the fluid

Answer

Pressure differences within the fluid

Question 26

Vapor pressure is the:

Accepted Answer

Pressure exerted by a vapor in equilibrium with its liquid phase

Answer

Pressure required to vaporize a liquid

Answer

Pressure difference between a gas and its liquid phase

Answer

Pressure at which a gas becomes a liquid

Question 27

Which of the following fluids typically has the highest surface tension?

Accepted Answer

Mercury

Answer

Water

Answer

Ethanol

Answer

Oil