1. Compared to fossil fuels, nuclear power plants produce:
A) More carbon dioxide
B) Less carbon dioxide during operation
C) Equal carbon dioxide
D) Only methane
Answer: B) Less carbon dioxide during operation
2. Nuclear energy is released from the nucleus of an atom through:
A) Chemical reaction
B) Physical change
C) Nuclear reaction
D) Combustion
Answer: C) Nuclear reaction
3. The process of splitting a heavy nucleus into smaller nuclei is called:
A) Fusion
B) Fission
C) Radiation
D) Ionization
Answer: B) Fission
4. The element most commonly used as fuel in nuclear reactors is:
A) Carbon
B) Uranium
C) Oxygen
D) Sodium
Answer: B) Uranium
5. The isotope of uranium used in most nuclear reactors is:
A) Uranium-238
B) Uranium-235
C) Uranium-234
D) Uranium-240
Answer: B) Uranium-235
6. Nuclear fusion involves:
A) Splitting heavy nuclei
B) Combining light nuclei
C) Burning fossil fuels
D) Chemical bonding
Answer: B) Combining light nuclei
7. The energy of the Sun is produced by:
A) Nuclear fission
B) Chemical reaction
C) Nuclear fusion
D) Radioactive decay
Answer: C) Nuclear fusion
8. The device used to control nuclear reactions in a power plant is called a:
A) Turbine
B) Generator
C) Reactor
D) Transformer
Answer: C) Reactor
9. Control rods in a nuclear reactor are used to:
A) Increase temperature
B) Absorb neutrons
C) Produce electricity
D) Cool the reactor
Answer: B) Absorb neutrons
10. The substance used to slow down neutrons in a reactor is called a:
A) Coolant
B) Moderator
C) Shield
D) Reflector
Answer: B) Moderator
11. Which particle initiates nuclear fission?
A) Proton
B) Electron
C) Neutron
D) Alpha particle
Answer: C) Neutron
12. The minimum amount of fissionable material required to sustain a chain reaction is called:
A) Atomic mass
B) Critical mass
C) Nuclear charge
D) Radioactive mass
Answer: B) Critical mass
13. The process in which unstable nuclei emit radiation is called:
A) Fusion
B) Fission
C) Radioactivity
D) Ionization
Answer: C) Radioactivity
14. Which radiation has the highest penetrating power?
A) Alpha
B) Beta
C) Gamma
D) Neutron
Answer: C) Gamma
15. Alpha particles consist of:
A) Electrons
B) Protons only
C) Two protons and two neutrons
D) Neutrons only
Answer: C) Two protons and two neutrons
16. Beta radiation consists of:
A) Helium nuclei
B) Fast-moving electrons
C) Neutrons
D) Protons
Answer: B) Fast-moving electrons
17. The unit used to measure radioactivity is:
A) Watt
B) Volt
C) Becquerel
D) Newton
Answer: C) Becquerel
18. The equation E = mc² was given by:
A) Isaac Newton
B) Albert Einstein
C) Niels Bohr
D) Ernest Rutherford
Answer: B) Albert Einstein
19. In nuclear power plants, heat produced in the reactor is used to:
A) Melt fuel
B) Generate steam
C) Produce light directly
D) Create sound
Answer: B) Generate steam
20. The steam produced in a nuclear plant rotates a:
A) Battery
B) Transformer
C) Turbine
D) Reactor core
Answer: C) Turbine
21. Heavy water used in some reactors contains:
A) Extra oxygen
B) Extra hydrogen
C) Deuterium
D) Helium
Answer: C) Deuterium
22. The by-products of nuclear fission are generally:
A) Stable gases only
B) Radioactive waste
C) Pure metals
D) Water vapor
Answer: B) Radioactive waste
23. A chain reaction occurs when:
A) One reaction triggers additional reactions
B) A nucleus becomes stable
C) Fusion stops
D) Radiation decreases
Answer: A) One reaction triggers additional reactions
24. Nuclear energy is considered a:
A) Renewable energy source
B) Non-renewable energy source
C) Fossil fuel
D) Solar fuel
Answer: B) Non-renewable energy source
25. The outer protective structure of a nuclear reactor is called:
A) Core
B) Moderator
C) Containment building
D) Generator
Answer: C) Containment building
26. The half-life of a radioactive substance is the time taken for:
A) All atoms to decay
B) Half of the atoms to decay
C) Temperature to double
D) Pressure to reduce
Answer: B) Half of the atoms to decay
27. Plutonium-239 can be used as:
A) Moderator
B) Coolant
C) Nuclear fuel
D) Shield
Answer: C) Nuclear fuel
28. The primary coolant in many reactors is:
A) Mercury
B) Water
C) Air
D) Hydrogen
Answer: B) Water
29. Nuclear reactors convert nuclear energy into:
A) Mechanical and electrical energy
B) Sound energy only
C) Chemical energy
D) Magnetic energy
Answer: A) Mechanical and electrical energy
30. The discovery of nuclear fission is credited to:
A) James Chadwick
B) Marie Curie
C) Otto Hahn
D) Max Planck
Answer: C) Otto Hahn