# Quantum mechanics MCQ Mechanical Engineering

50 Questions 30 Mins

### About Quantum mechanics

The Fascinating World of Machine Dynamics: What You Need to Know

Have you ever wondered how machines work? What forces are at play when a machine moves? How can we optimize machine movement for efficiency and performance?

The answer to these questions lies in the fascinating world of machine dynamics.

Machine dynamics is the study of how machines move and interact with their surroundings. It encompasses a wide range of topics, from the design and analysis of machinery to the control and operation of complex systems. machine dynamics is an interdisciplinary field that draws on principles from physics, engineering, and mathematics. It is the study of how machines move and interact with their surroundings. It encompasses a wide range of topics, from the design and analysis of machinery to the control and operation of complex systems. machine dynamics is an interdisciplinary field that draws on principles from physics, engineering, and mathematics. It is an essential part of many industries, including transportation, manufacturing, construction, and energy production. A better understanding of machine dynamics can lead to improved safety, efficiency, and productivity in these industries.

Machine dynamics is a complex and fascinating field of study. If you're interested in learning more about machine dynamics, there are a few resources that can help you get started.

Following are some of the multiple choice questions on the Quantum mechanics with answers that will help the students in developing their knowledge.

## Quantum mechanics MCQ

### 1. Which two characteristics are variables in Heisenberg's uncertainty principle?

• wavelength and distance
• position and momentum
• charge and displacement
• atomic radius and frequency

### 2. How does a scanning tunneling microscope map a surface?

• by measuring the size of each individual electron
• by measuring the voltage created by electron transfer
• by measuring the size of each atom of the surface
• by measuring the current due to tunneling electrons

### 3. The use of a scanning tunneling microscope places a conducting tip

• 0.5 to 0.8 nm from the surface
• 0.4 to 0.7 nm from the surface
• 0.4 to 0.9 nm from the surface
• 0.3 to 0.5 nm from the surface

### 4. Why can't we study dark matter and dark energy?

• Matter blocks them out
• They move way too fast
• Because of the expansion of the universe
• Light does not reflect off of dark matter and dark energy

• Electron
• Proton
• Quark
• All of above

### 6. Where did most of the Founding Fathers of Quantum Mechanics come from?

• New York
• The United States
• Asia
• Germany

### 7. What are protons, neutrons, and electrons made of?

• Duck quacks
• Strange quarks
• Up and down quarks
• Leptons

### 8. Why do galaxies move away from one another?

• The galaxies are expanding
• They are not moving away from one another
• The expansion of the universe
• Dark matter and dark energy

### 9. Who had the first idea of the existence of atoms?

• The Romans
• The Greeks
• The Avengers
• The Pythagoreans

### 10. What is Quantum Mechanics?

• Making/finding a description of how small particles look & act
• Fixing small cars
• Understanding objects on the macro scale
• Understanding the quantum realm in the MCU

### 11. The common between classical and quantum mechanical fundamental distribution function is :

• they all depend upon the quantity that define state only
• they all depend only upon the energy of the state
• they all depend both on energy and quantity defining state
• nothing is common in them

### 12. The basic principle behind Quantum Mechanics

• Heisenberg's uncertainity principle
• Newton's laws
• Wein's displacement law
• Planck's radiation law

### 13. What does an electron act like?

• A field
• A wave
• A ball
• None of these

### 14. What keeps protons and neutrons together in the nucleus of an atom?

• Electromagnetism
• Love
• Gluons
• All of above

• Proton
• Higgs boson
• Positron
• All of above

### 16. What happens if you shoot a neutrino at the earth?

• It explodes
• It makes new particles
• It goes through
• All of above

### 17. What is the current interpretation of physical theories?

• Quantum field theory
• nihilistic theory
• We haven't current interpretation.
• String theory

### 18. What is the uncertainty principle?

• We can't know 2 parameters at the same time, only both with a margin of uncertainty.
• We can only know 1 parameter of 2, having the other with uncertainty
• We can't have known of any parameter
• None of these

### 19. Why are scientist pretty sure dark matter and dark energy exist?

• We are made of dark matter and dark energy
• In a galaxy the stars the orbit on the outer edge of our galaxy should orbit slower than the stars closer to the center, but star on the outer edges orbit at about the same speed as the stars near the center.
• Because Albert Einstein said so
• The equation e=mc^2 proves they exist

### 20. Who is Max Planck?

• A chemist
• A physicist and the Quantum Mechanics pioneer
• Communism's creator
• None of these

### 21. Before 1925, quantum theory

• faced little challenge to its credibility
• lacked organization
• had wide applications
• was widely accepted

### 22. In quantum mechanics is energy conserved?

• Always
• never
• yes and not, the not is because it's only momentarily
• All of above

### 23. What was the atomic model that had the problem it triggered in quantum atomic model?

• Dalton's model
• Heissenberg's model
• Thompson's model
• Rutherford's model

### 24. Which is the number of the most equations of Quantum Mechanics?

• planck's constant (h)
• Speed of electron (z)
• Wavelegth of water molecule (A)
• Size of universe (ñ)

### 25. On what scale is quantum mechanics used?

• Planck scale
• Macro scale
• Body weight scale
• Micro scale

### 26. What can Zur Quantenmechanik be translated to?

• "To Rome We Go"
• Greece, Rethymno
• "Sweet Home Alabama"
• "To Quantum Mechanics"

### 27. According to classical mechanics, which law(s) apply or applies to the behavior of macroscopic particles?

• Newton's three laws
• the differential wave equation
• Dalton's law of multiple proportions
• Kepler's Law

### 28. A determinist view of the world would expect

• objects to move as they see fit
• science to be formulaic
• objects to follow predetermined paths
• scientist to conduct experiments

### 29. Which man wrote Mr. Tompkins in Wonderland?

• George Orwell
• Lewis Carroll
• George Gamow
• C.S. Lewis

### 30. In Mr. Tompkins in Wonderland, strange apparitions are a result of

• alpha decay
• large magnitudes of Planck's constant
• the Pauli exclusion principle

### 31. Which book's protagonist explores a quantum jungle?

• A New System of Chemical Philosophy
• Optiks
• Mr. Tompkins in Wonderland
• The Jungle

### 32. Which physicist proposed the uncertainty principle in 1927?

• Niels Bohr
• Albert Einstein
• Arnold Schrodinger
• Werner Heisenberg

### 33. How does the scattering of a photon affect an electron

• by splitting it in two
• by charging its charge
• by making it disappear
• by changing its position

### 34. All of the following statements about Schrodinger's cat are true EXCEPT

• it was conducted in 1935
• the cat is sealed inside of a box
• the cat  is both alive and dead
• there is a 50 percent chance a vial of poison is released inside the box

### 35. Schrodinger's cat experiment tested

• the probability of quantum tunneling
• Bohr's atomic model
• whether a quantum system could exist in multiple states
• radioactive decay in Plutonium

### 36. An object's path can be predicted using Newton's

• uncertainty principle
• particle theory
• conservation laws
• laws of motion

### 37. The probability density is the

• square root of the wave function
• absolute value of the wave function
• inverse of the wave function
• absolute square of the wave function

### 38. Schrodinger's equation described the

• procedure for splitting an atom
• complement of the wave function
• behavior of "matter" waves
• motion of light

• psi
• phi
• mu
• pi

• perfunctory
• unimportant
• simplified
• complex

• A wave
• A particle
• Both
• Both A & B

### 42. Which is the equation of De Broglie's hypothesis correct? (Wavelenght is equals to...)

• h/(mv) = planck constant/(mass·speed)
• h/v = planck constant/speed
• v/m = speed/mass
• All of above

### 43. Which is the atomic model now?

• Shrodingüer's model
• Quantum's model
• Einstein's model
• Both A & B

### 44. What experiment changed classical mechanics of physics by of a theoretical error?

• The black hole
• Newton's prime
• The ultraviolet catastrophe
• the infrared effect

### 45. In what field of science is quantum mechanics important

• Physics
• Biology
• The liberal arts
• Geology

### 46. What is the Planck length of a meter

• 65 billion times the size of a meter
• 1.6*10^-35 of a meter
• 99*10^-57 of a meter
• Max Planck never had a length named after him

### 47. Who discovered the electron?

• J.R.R. Tolkien
• J.J. Thompson
• J.K. Rowling
• No one, the electron does not exist

### 48. How do neutron stars form

• A star's core collapses
• The moon smashes in to Earth
• A strange quark is able to turn everything in to strange matter
• Time travel

### 49. What makes the strange quark so strange?

• It is nearly perfect
• Every other quark that touches the strange quark is turned into a strange quark
• All of the above

### 50. How much of the universe's energy distribution is dark matter and dark energy?

• Dark matter is 26% and dark energy is 74% of the universe's total energy distribution
• Dark energy is 69% and dark matter is 26% of the universe's total energy distribution
• Both dark energy and dark matter are 5% of the universe's total energy distribution
• Dark matter and dark energy don't exist