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Fluid Mechanics MCQ

A Mach Number is a way to describe what?

How high an airspeed an airplane can fly

How fast an object is moving

The speed of sound

The Mach Number

Answer

Correct Answer: The Mach Number

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What is the definition of the Mach Number?

The maximum speed attained by an aircraft

How to calculate Mach Numbers

The speed of sound in air

The speed of sound

An introduction to and a definition of the Mach Number

Answer

Correct Answer: An introduction to and a definition of the Mach Number

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What is the Mach number of an object when traveling through a medium?

The magnitude of the drag on the object due to its motion through the medium

The ratio of the object's speed to the speed of sound in that medium

Answer

Correct Answer: The ratio of the object's speed to the speed of sound in that medium

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What is the ratio of the object's speed to the speed of sound in that medium?

Energy

Speed of light

Velocity

Kinetic energy

Mach number

Answer

Correct Answer: Mach number

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Which Italian mathematician developed the three laws of fluid continuity?

Lagrange

Gauss

Bernoulli

Euler

Answer

Correct Answer: Euler

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What is lift?

The upward force on an object due to the wind

The sum of all the aerodynamic forces normal to the direction of the external airflow

The force that holds an airplane in the air

The difference in air pressure between the top and bottom of an airplane

The maximum velocity of an object through the air

Answer

Correct Answer: The sum of all the aerodynamic forces normal to the direction of the external airflow

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What is the term for the sum of all the aerodynamic forces normal to the direction of the external airflow?

Lift

Drag

Pressure difference

Wind

Answer

Correct Answer: Lift

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What does the term "gravitational, electric, and fluid potentials" describe?

The behavior of gravitational, electric, and fluid potentials

The three types of potential energy

The mathematical description of the potentials

The mathematical relationships between gravitational, electric, and fluid potentials

The types of potentials

Answer

Correct Answer: The behavior of gravitational, electric, and fluid potentials

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What are three types of flow?

Aqueous, exsudative or bloody

Laminar, transitional or turbulent

Static, equilibrium or random

Answer

Correct Answer: Laminar, transitional or turbulent

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What are dimensionsless speed models used for?

Used to measure air speed

Used to model collisions between particles in fluids

Used by modelers who wish to non dimensionless speed

Used to predict the future course of a particle

Used to model a physical process that does not change over time

Answer

Correct Answer: Used by modelers who wish to non dimensionless speed

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What people use dimensionless speed?

Lawyers

Speeds

Miles per hour

Photographers

Modelers

Answer

Correct Answer: Modelers

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What is the name of the constant that is common in fluid mechanics and thermodynamics?

The Kármán line

The Molecular Weight of Water

Individual and Universal Gas Constant

Avogadro's Number

Newton's Second Law of Motion

Answer

Correct Answer: Individual and Universal Gas Constant

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What is the name of the book that explains the constants?

The Mathematical Principles of Natural Philosophy

The General and Special Theory of Relativity

The Big Bang Theory

The Book of Science

The Individual and Universal Gas Constant

Answer

Correct Answer: The Individual and Universal Gas Constant

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When calculating density, what must be given special attention?

The number of particles in a unit volume

The Amount of Substance

The Type of Matter

Properties of Gas Mixtures

Mass and Volume

Answer

Correct Answer: Properties of Gas Mixtures

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What must be done when calculating properties of gas mixtures?

The properties of each gas must be considered

Special care must be taken

Molecular weights must be considered

The perfect gas law must be used

The properties of the individual gases must be combined

Answer

Correct Answer: Special care must be taken

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What is the name of the law that tells us the change in density is directly related to the change in temperature and pressure?

Kelvin Scale

Ptolemaic Theory

Ideal Gas Law

Second Law of Thermodynamics

Celsius Scale

Answer

Correct Answer: Ideal Gas Law

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In the ideal or perfect gas law, what is related to the change in temperature and pressure?

Pressure

Volume

Density

Answer

Correct Answer: Density

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What is the fluid dynamics applied to?

Electricity

Air

Liquids, such as water, alcohol, and oil

Blood

Answer

Correct Answer: Liquids, such as water, alcohol, and oil

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What is the fluid dynamics applied to liquids like?

Thermodynamics

Dinamics

Hydrodynamics

Fluid Mechanics

Atomistics

Answer

Correct Answer: Hydrodynamics

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What is the relationship between hydraulics and liquids?

Hydraulic devices

Hydraulic fluid

Mechanical tasks

Liquid droplets

Fluid pressure

Answer

Correct Answer: Mechanical tasks

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What is the name of the constant found in both fluid mechanics and thermodynamics?

The Kelvin Constant

The Boltzmann Constant

The Molecular Weight

The Individual and Universal Gas Constant

Answer

Correct Answer: The Individual and Universal Gas Constant

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In what field is the Individual and Universal Gas Constant common?

Physics

Fluid mechanics and thermodynamics

Chemistry

Answer

Correct Answer: Fluid mechanics and thermodynamics

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What is the name of the law that must be taken care when working with gas mixtures?

Charles's law

Gas law of thermodynamics

Ideal gas law

Gas law of Young

Boyle's law

Answer

Correct Answer: Ideal gas law

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What is the name of the law that describes the change in density when you change the temperature and pressure of an ideal gas?

Thermodynamic Law

Ideal Gas Law

Charles's Law

Ideal Gas Equation

Boyle's Law

Answer

Correct Answer: Ideal Gas Law

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The Ideal Gas Law states that changes in density are related to changes in temperature and pressure in what way?

Directly

Inversely

Proportional to temperature and pressure

Potentially

Answer

Correct Answer: Directly

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What is the Froude Number?

An introduction to and a definition of the Froude Number

A measure of the efficiency of a propeller

A number that indicates the effectiveness of a sound wave

A number that determines how loud a sound is

A numerical measure of a ship's speed

Answer

Correct Answer: An introduction to and a definition of the Froude Number

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What number is used to measure the average velocity of a body?

Froude Number

Foot per Second

Kilometer per Second

Gaussian Number

Boltzmann Constant

Answer

Correct Answer: Froude Number

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What is the term used to describe the three types of fluid flow?

Hydrostatic, aerodynamic and capillary

Volumetric, or constant

Laminar, transitional or turbulent

Continuous, or discontinuous

Answer

Correct Answer: Laminar, transitional or turbulent

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Which equations are found in Fluid Mechanics?

Continuity, Euler, Bernoulli, Kinetic and Viscous Pressure

Continuity, Euler, Bernoulli, Dynamic and Total Pressure

Euler, Bernoulli, Continuity, Dynamic and Total Pressure

Continuity, Euler, Bernoulli, Potential and Static Pressure

Euler, Bernoulli, Continuity, Static and Total Pressure

Answer

Correct Answer: Continuity, Euler, Bernoulli, Dynamic and Total Pressure

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What three types of energy are considered in Bernoulli Equation?

Kinetic, potential and thermal

Electrical, thermal and nuclear

Pressure, potential and kinetic

Thermal, potential and elastic

Magnetic, gravitational and light

Answer

Correct Answer: Pressure, potential and kinetic

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What is the Bernoulli Equation useful for solving?

Determining the trajectory of an object

Problems involving ballistics

Calculating probabilities

Problems involving gases

Problems involving fluids

Answer

Correct Answer: Problems involving fluids

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What is a turbine used for?

Production of Electricity

Power Generation

Producing Gasoline or Diesel Fuel

Aircraft Engines

Fluid Flow Measurement

Answer

Correct Answer: Fluid Flow Measurement

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What are orifices?

Anatomy - Orifices are the openings through which organs and body parts take in air, food, and other substances.

Fluid Flow Measurement - An introduction to different types of fluid flowmeters - Orifices

Sewage Treatment Facilities - Chambers that treat wastewater by means of anaerobic digestion or chlorination

Magnifying Glasses - Orifices used to increase magnification

Answer

Correct Answer: Fluid Flow Measurement - An introduction to different types of fluid flowmeters - Orifices

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What type of information is available on fluid flow-meters?

Standards and guidelines for

Tools and information regarding

Fluid measurement devices

Fluid volume measurements and calculations

Fluid flow rates only

Answer

Correct Answer: Tools and information regarding

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What type of meter is used to measure flow?

Volumetric Flow-meters

Electric Resistance Flow-meters

Electricity Flow-meters

Gas Flow-meters

Fluid Flow-meters

Answer

Correct Answer: Fluid Flow-meters

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What is the difference between Cv and Kv?

The voltage across an ion-gated channel.

The direction of the electric current

The difference between the flow coefficient Cv and Kv.

The number of cardiac cycles per minute.

More than one difference

Answer

Correct Answer: The difference between the flow coefficient Cv and Kv.

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What number is used to describe the fact that the numbers on a domino are the same as the numbers on the next domino in line?

Golden Ratio

Euler Number

Lucas Number

Fibonacci Number

Answer

Correct Answer: Euler Number

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What is the name of the Euler Number?

A property of certain infinite sequences

A constant in mathematics

A brief history of mathematics and the Euler Number

A list of some properties of the Euler Number

An introduction to and a definition of the Euler Number

Answer

Correct Answer: An introduction to and a definition of the Euler Number

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What is density?

An introduction and definition of density

A measure of how full a container is

A measurement of mass in space

A physical property of matter

A measure of the number of objects per unit area

Answer

Correct Answer: An introduction and definition of density

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What are density, specific weight and specific gravity?

The physical properties of objects, density, specific weight and specific gravity.

The use of density to calculate weight, specific weight and specific gravity in laboratory experiments.

An introduction and definition of density, specific weight and specific gravity. Formulas with examples

Answer

Correct Answer: An introduction and definition of density, specific weight and specific gravity. Formulas with examples

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How much loss is due to friction in pipes and ducts?

Minor loss

Major loss

Answer

Correct Answer: Major loss

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What is the major loss - head loss or pressure loss - due to friction in pipes and ducts?

Pressure Loss and Flame Out

Head Loss and Friction

Pressure Loss and Head Loss

Pressure Loss and Vibration

Head Loss and Vibration

Answer

Correct Answer: Pressure Loss and Head Loss

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What does pressure loss due to friction in pipes and ducts mean?

Major loss - head loss or pressure loss

No change in pressure

Minor loss - minor pressure drop

Minor loss - pressure loss

Answer

Correct Answer: Major loss - head loss or pressure loss

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What is the law of conservation of mass?

The law of conservation of mass states that mass can neither be created or destroyed.

The law of thermodynamics states that the entropy of an isolated system always increases over time.

The law of thermodynamics states that energy can only be lost or gained.

The law of conservation of energy states that energy can neither be created or destroyed.

Answer

Correct Answer: The law of conservation of mass states that mass can neither be created or destroyed.

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What does "conservation of mass" mean?

The law of conservation of energy states that energy can neither be created or destroyed

The law of conservation of mass states that mass can neither be created or destroyed

The law of conservation of momentum states that momentum can neither be created or destroyed

Answer

Correct Answer: The law of conservation of mass states that mass can neither be created or destroyed

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Conservation of what?

Information

Matter

Energy

Answer

Correct Answer: Energy

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Conservation of mass, including energy, is referred to as what?

Conservation of momentum

Conservation of energy

Conservation of mass

Answer

Correct Answer: Conservation of energy

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What does the term "conservation laws" mean?

Properties

The laws of thermodynamics

Rules of behavior

A mathematical formula

Naming a group of atoms

Answer

Correct Answer: Properties

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Conservation laws state that particular measurable properties of an isolated system doesn't change what?

As the system evolves

As the number of entities in the system increases

As the system is disturbed

The number of particles in the system

The amount of energy in the system

Answer

Correct Answer: As the system evolves

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The Coanda Effect is what type of force?

Gravitational force

Force that pushes or pulls objects

Electromagnetic force

Tendency of a stream of fluid

Energy that flows through a fluid

Answer

Correct Answer: Tendency of a stream of fluid

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What is the Coanda Effect?

The tendency of a fluid to circulate around an obstacle

The tendency of a stream of fluid to stay attached to a convex surface

The ability of gas to move through small holes

The tendency for a liquid to flow over a curved surface

The tendency of a fluid to move in a straight line

Answer

Correct Answer: The tendency of a stream of fluid to stay attached to a convex surface

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What is the name of the constant commonly used in fluid mechanics and thermodynamics?

The Kinematic viscosity of water

The Boltzmann Constant

The Thermal conductivity of copper

The Fluid Mechanics Speed of Sound

The Individual and Universal Gas Constant

Answer

Correct Answer: The Individual and Universal Gas Constant

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What field is concerned with the relationship between temperature and volume?

Fluid mechanics and thermodynamics

Earth science

Mechanical engineering

Chemistry

Chemical engineering

Answer

Correct Answer: Fluid mechanics and thermodynamics

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What must be done differently for gas mixtures than for ideal gases?

Dealing with compressibility

Calculating the volume

Calculating the mass

Taking into account temperature

Calculating the pressure

Answer

Correct Answer: Calculating the mass

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What is the name of the law that states that the change in density of a gas is related to the change in temperature and pressure?

Ideal Gas Law

Thermodynamic Law

Charles's Law

Conservation of Energy

Boyle's Law

Answer

Correct Answer: Ideal Gas Law

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What does the Ideal Gas Law say about the change in density with changes in temperature or pressure?

Dependent on temperature

Directly related

Temperature has no effect

Dependent on pressure

Pressure has no effect

Answer

Correct Answer: Directly related

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If a fluid is compressible, what must be considered?

Compressibility

Pressure

Volume

Temperature

Answer

Correct Answer: Compressibility

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The compressibility of the fluid must be considered when what type of flow is involved?

Rarefied

Compressible

Incompressible

Answer

Correct Answer: Compressible

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Roughly how many stages of control valve are typically used?

Two stage control valves

One stage control valves

Multi stage control valves

Single stage control valves

Answer

Correct Answer: Multi stage control valves

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What do control valves do?

Convert heat to work

Convert heat to mechanical energy

Regulate fluid pressure

Cavitation

Regulate pressure

Answer

Correct Answer: Cavitation

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What is NPSH?

Net Positive Suction Head

Negative Pressure Suction Head

Positive Pressure Suction Head

Answer

Correct Answer: Net Positive Suction Head

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How many different kinds of viscosity are there?

Dynamic, Absolute and Kinematic Viscosity

Thermal, Fluids and Plastics Viscosity

Static, Kinematic and Absolute Viscosity

Molecular, Cooper and Rayleigh Viscosity

Dynamic, Kinematic and Absolute Viscosity

Answer

Correct Answer: Dynamic, Absolute and Kinematic Viscosity

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What are cSt, cP, SSU and ESU?

Cubic centiStokes

Second

Cubic meters

CentiStokes

Square feet

Answer

Correct Answer: CentiStokes

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What is the term for the layer of fluid in the immediate vicinity of a bounding surface?

Film

Aerosol layer

Fluid sheath

Boundary layer

Subsurface layer

Answer

Correct Answer: Boundary layer

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The boundary layer is the layer of fluid in the immediate vicinity of what?

A surface of revolution

A bounding surface

A vacuum

A surface of contact

The surface of a body

Answer

Correct Answer: A bounding surface

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The Bernoulli's Equation describes the behavior of what?

Solid particles

Gasoline

Gas molecules

Moving fluids

Blowing bubbles

Answer

Correct Answer: Moving fluids

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What equation describes the behavior of moving fluids along a streamline?

Equation of State

The Navier-Stokes Equation

Viscous Flow

Bernoulli's Equation

The equations of hydrostatics

Answer

Correct Answer: Bernoulli's Equation

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What type of mathematics is involved in aeronautics?

Statistics

Mechanics

Linear Algebra

Calculus

Answer

Correct Answer: Mechanics

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What is the mathematics and mechanics of flying objects?

Aerospace engineering

Mechanics

Astronomy

Aeronautics

Answer

Correct Answer: Aeronautics

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The Ideal Gas Law is what suggests that the change in density is directly related to the change in temperature and pressure?

For a perfect or ideal gas

The Charles Law

The Boyles Law

The gas law is a relation between temperature and pressure

The gas law states that PV = nRT

Answer

Correct Answer: For a perfect or ideal gas

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What is the name of the law that describes the relationship between the change in density and the change in temperature and pressure for an ideal gas?

Ideal Gas Law

Charles's Law

Gas Law

Thermodynamic Equation

Boyle-Mariotte Law

Answer

Correct Answer: Ideal Gas Law

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What type of flow is studied by aerodynamics?

Solids

Gases

Solid

Liquid

Liquids

Answer

Correct Answer: Gases

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What type of science studies the flow of gases?

Earth science

Chemistry

Geology

Aerodynamics

Answer

Correct Answer: Aerodynamics

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What is a term that is related to Acoustical Engineering?

Develops ways to correct sound problems in buildings

Develops methods for measuring sound levels

Uses mathematical models to recreate sound patterns

Explains to architects and engineers the basic science of acoustics

Studies the physics and engineering of sound

Answer

Correct Answer: Explains to architects and engineers the basic science of acoustics

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What is the basic science of acoustics?

Acoustic Engineering

Audiology

Acoustics

Acoustical Engineering

Answer

Correct Answer: Acoustical Engineering

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What type of theory is acoustic theory?

Theoretical

Sociology

Experimental

Physics

Mathematical

Answer

Correct Answer: Mathematical

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Relating to mathematical description of sound waves, what is the field called that deals with acoustics?

Acoustic physics

Acoustic engineering

Acoustic theory

Acoustics

Answer

Correct Answer: Acoustic theory

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What is another name for a matrix?

Square matrix, triangular matrix, or quaternion

Sheet, slab, or grid

Table or array

Array, table, or dataset

Zero (scalar), one (vector), two (usual matrix), or higher number of dimensions

Answer

Correct Answer: Zero (scalar), one (vector), two (usual matrix), or higher number of dimensions

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In what type of representation do a tensor can be represented as?

Vector

Matrix

Scalar

Multi-dimensional array

Answer

Correct Answer: Multi-dimensional array

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What type of Point values don't have a direction?

Vectors

Matrices

Scalars

Answer

Correct Answer: Scalars

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What type of indexing is used in products of repeated indices?

Inclusion

Exclusion

Summation

Inverted index

Weighted average

Answer

Correct Answer: Summation

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What is the index representation of the inner or dot product?

Vector Space

Column Store Index

Vectorized Index

Repeated Index

Scalar Product

Answer

Correct Answer: Repeated Index

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What can you not do when using repeated indices?

Use an Out-Of-Bounds Exception

Access a field before it is initialized

Use a custom index

Add an index

Repeat an index

Answer

Correct Answer: Repeat an index

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What does change sign under an orientation reversing coordinate?

Matrix

Real Tensor

Pseudo Tensor

Vector

Answer

Correct Answer: Pseudo Tensor

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What do you convert from a pseudo tensor to a physical tensor?

Division

Integration

Multiplication

Addition

Answer

Correct Answer: Multiplication

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What doesn't depend on the coordinate system you use?

The position of an object in a coordinate system

The speed of light in a vacuum

The Euler characteristic

The sign of a physical tensor

The Poisson bracket

Answer

Correct Answer: The sign of a physical tensor

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What is a good example of a physical tensor?

Electric field

Electric current

Mass

Position

Answer

Correct Answer: Position

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The Kronecker delta function is one if the indices are what?

Equal

Negative

Powers of two

Integers

Answer

Correct Answer: Equal

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What are all scalars?

Isotropic

Tensors

Vectors

Singular

Vector

Answer

Correct Answer: Isotropic

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What is the name of the language used to describe vectors, tensors, and fluid mechanics?

Mach-Zehnder Formula

APL

Lorentz Force Law

Mathematica

Einstein Notation

Answer

Correct Answer: Einstein Notation

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What is another name for Einstein Notation?

Index Notation

Notation of Quantum Mechanics

Alphabet Notation

Symbol Notation

Notation of General Relativity

Answer

Correct Answer: Index Notation

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What are the front and the back of a body reflections of each other?

A cylinder or a football

A mirror

Two circles

Two rectangles

Answer

Correct Answer: A cylinder or a football

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What direction is y=r-R?

Counterclockwise

Uniform

Reflection

Normal

Clockwise

Answer

Correct Answer: Normal

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What is the limit where R<<1?

Limit of a rational function

Infinity

Limit of an irrational function

Flat Earth Limit

Answer

Correct Answer: Flat Earth Limit

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A body of revolution is an example of what?

Unstructured gas

Solid sphere

An idea

Structured fluid

A large quantity of fuel

Answer

Correct Answer: Structured fluid

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What kind of fluid has an orientation vector?

Dynamic

Structured

Biconic

Eulerian

Answer

Correct Answer: Structured

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What is the product of the gradient operator with a vector?

Dot Product

Curl Cross

Vector magnitude

Vector Dot

Vector Cross

Answer

Correct Answer: Curl Cross

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What is the length of the product vector produced by the cross product?

Irrelevant

Proportional to

Triangular

Opposite of

Inverse of the product vector

Answer

Correct Answer: Proportional to

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What is an example of a closed 2-D curve?

Hyperbola

Path

Bézier curve

Parabola

Ellipse

Answer

Correct Answer: Ellipse

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If the tensor is anti-symmetric with respect to its first two indices, what does Aijk mean?

Aijk = -1

Aijk is symmetric

Aijk = "Ajik

Aijk = 0

Answer

Correct Answer: Aijk = "Ajik

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