Quantum Chromodynamics MCQs with Answers

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Quantum Chromodynamics Online Quiz

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• Test Name: Quantum Chromodynamics MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Quantum Chromodynamics

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1 / 40

What is the term for the breaking of the QCD vacuum symmetry?

Chiral symmetry breaking

Gravitational symmetry breaking

Electroweak symmetry breaking

2 / 40

Which quark is the heaviest?

Bottom quark

Top quark

Charm quark

3 / 40

Which concept describes how the color force becomes stronger as quarks move apart?

Asymptotic freedom

Confinement

Color charge

4 / 40

What is a characteristic feature of gluons in QCD?

Self-interaction

Lack of mass

Carrying electric charge

5 / 40

What is the name given to the hypothetical particles that mediate the strong force in QCD?

W bosons

Z bosons

Gluons

6 / 40

How many types of gluons are there in QCD?

8

6

3

7 / 40

What is the quantum number that describes a quark's color charge?

Color

Flavor

Spin

8 / 40

What are the two types of hadrons?

Leptons and bosons

Fermions and bosons

Baryons and mesons

9 / 40

Which of the following is a meson?

Neutron

Proton

Pion

10 / 40

What is the term for the mathematical framework that QCD is based on?

General relativity

Gauge theory

String theory

11 / 40

What is the process called where a quark and an antiquark pair is created from the vacuum?

Pair production

Annihilation

Fusion

12 / 40

What is the effect of the strong force within nucleons on nuclear structure?

Creating atomic orbitals

Repelling nucleons

Binding nucleons together

13 / 40

Which term refers to the group of symmetries including translations, rotations, and internal symmetries in QCD?

Gauge symmetry

Translational symmetry

Lorentz symmetry

14 / 40

In QCD, quarks are always found in groups called what?

Leptons

Hadrons

Bosons

15 / 40

What is the QCD term for a force-carrying particle?

Scalar boson

Gauge boson

Fermion

16 / 40

Which type of symmetry is fundamental in QCD?

SU(3) symmetry

U(1) symmetry

SU(2) symmetry

17 / 40

What is the phenomenon called where quarks are never found in isolation?

Quark confinement

Color neutrality

Asymptotic freedom

18 / 40

Which particles are affected by the strong force?

Photons and gravitons

Electrons and neutrinos

Quarks and gluons

19 / 40

What role do Feynman diagrams play in QCD?

Define particle spin

Represent particle interactions

Measure particle masses

20 / 40

Which quark flavor changes in beta decay, a process mediated by the weak force?

Strange quark

Top quark

Down quark

21 / 40

What is the term for the increasing strength of the strong force at short distances?

Asymptotic freedom

Color force

Confinement

22 / 40

What principle prohibits quarks of the same color and flavor from occupying the same quantum state?

Heisenberg uncertainty principle

Bohr quantization rule

Pauli exclusion principle

23 / 40

What experimental evidence supports the existence of quarks?

Photoelectric effect

Deep inelastic scattering

Double-slit experiment

24 / 40

Which concept explains why quarks behave as free particles at high energies?

Symmetry breaking

Confinement

Asymptotic freedom

25 / 40

What is the potential energy behavior between two quarks as the distance between them increases?

Increases

Decreases

Remains constant

26 / 40

What property do gluons carry that allows them to interact with each other?

Electric charge

Color charge

Mass

27 / 40

In QCD, what is the term for a bound state of three quarks?

Baryon

Meson

Lepton

28 / 40

Which phenomenon is not explained by QCD?

Electromagnetic interaction

Hadron mass spectrum

Quark confinement

29 / 40

What is the force carrier of the strong interaction in QCD?

Graviton

Photon

Gluon

30 / 40

What is the property of quarks that relates to their interaction via the strong force?

Color charge

Spin

Electric charge

31 / 40

What is the main evidence for quark confinement?

No free quarks observed

Gluons directly observed

Free quarks detected

32 / 40

Which property is conserved in all strong interactions?

Color charge

Electric charge

Weak charge

33 / 40

What does the "Q" in QCD stand for?

Quality

Quark

Quantum

34 / 40

What is the theoretical framework used to describe the interactions of quarks and gluons?

Quantum Chromodynamics

Electrodynamics

Quantum Gravity

35 / 40

Which particle decay process involves the strong interaction?

Beta decay

Neutron decay

Proton decay

36 / 40

What does QCD predict about the interaction between quarks at very high energies?

Neutralization

Confinement

Asymptotic freedom

37 / 40

How many colors of quarks are there in QCD?

2

3

6

38 / 40

What is the lowest energy state of a quantum system in QCD called?

Excited state

Ground state

Virtual state

39 / 40

What is the QCD prediction for the high-energy limit of the strong coupling constant?

It decreases

It increases

It remains constant

40 / 40

In QCD, what is the term for a pair of quark and antiquark bound together?

Lepton

Meson

Baryon

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