Practice test

Radioactivity and nuclear energy - Test Set 3

Review 20 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

20 questions

Questions and explanations

  1. Question 1

    The process of spontaneous emission of radiation by unstable nuclei is called:
    1. Fusion
    2. Radioactivity
    3. Ionization
    4. Combustion
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  2. Question 2

    What is the approximate half-life of Uranium-238?
    1. 12 hours
    2. 704 million years
    3. 1.2 billion years
    4. 4.5 billion years
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  3. Question 3

    Which radioactive isotope is used to detect blood clots?
    1. Sodium-24
    2. Gallium-67
    3. Iodine-125
    4. Xenon-133
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  4. Question 4

    Disintegration series is associated with which kind of elements?
    1. Light elements
    2. Gaseous elements
    3. Gaseous elements
    4. Inert gases
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  5. Question 5

    Which of the following is not used as a control material in nuclear reactors?
    1. Boron rods
    2. Cadmium rods
    3. Graphite
    4. Mercury
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  6. Question 6

    Which of the following particles has the least penetrating power?
    1. Alpha
    2. Beta
    3. Gamma
    4. Neutron
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  7. Question 7

    The device used to detect and measure radioactivity is called:
    1. Ammeter
    2. Geiger-Muller Counter
    3. Barometer
    4. Photometer
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  8. Question 8

    Which of the following radioactive isotopes is used in the treatment of thyroid disorders?
    1. Iodine-131
    2. Cobalt-60
    3. Uranium-238
    4. Xenon-133
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  9. Question 9

    Which component absorbs excess neutrons in a nuclear reactor?
    1. Moderator
    2. Coolant
    3. Control Rod
    4. Fuel Rod
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  10. Question 10

    Radioactivity is measured in:
    1. Kelvin
    2. Sievert
    3. Tesla
    4. Curie
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  11. Question 11

    What is the primary use of Sodium-24 in medical applications?
    1. Thyroid treatment
    2. Blood flow studies
    3. Cancer therapy
    4. Bone imaging
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  12. Question 12

    Which process is responsible for the energy production in the Sun?
    1. Nuclear fission
    2. Beta decay
    3. Alpha decay
    4. Nuclear fusion
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  13. Question 13

    Which material is used to shield gamma radiation in nuclear reactors?
    1. Water
    2. Lead
    3. Graphite
    4. Boron
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  14. Question 14

    Which element is used as a control rod material in nuclear reactors?
    1. Uranium
    2. Cadmium
    3. Graphite
    4. Heavy water
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  15. Question 15

    Which scientist is credited with the discovery of nuclear fission?
    1. Otto Hahn
    2. Enrico Fermi
    3. Niels Bohr
    4. Ernest Rutherford
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  16. Question 16

    What is the primary use of Gallium-67 in medicine?
    1. Thyroid treatment
    2. Tumor detection
    3. Blood flow studies
    4. Bone imaging
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  17. Question 17

    Which scientist is credited with the discovery of nuclear fission?
    1. Otto Hahn
    2. Enrico Fermi
    3. Niels Bohr
    4. Ernest Rutherford
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  18. Question 18

    What is the primary fuel used in a nuclear fusion reaction?
    1. Uranium-235
    2. Deuterium
    3. Plutonium-239
    4. Thorium-232
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  19. Question 19

    Which process is used in the atom bomb?
    1. Nuclear fusion
    2. Alpha decay
    3. Nuclear fission
    4. Beta decay
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  20. Question 20

    What is the energy released in a nuclear reaction primarily due to?
    1. Chemical bonding
    2. Mass defect
    3. Electron excitation
    4. Kinetic energy
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