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- 1. Multiple Choice
A sub-atomic event in which a uranium nucleus splits into lighter radioactive materials, neutrons, gamma rays and neutrinos is called a:
Fusion
Chain reaction
Enrichment
Fission reaction
- 2. Multiple Choice
The series of events in which neutrons split from uranium nuclei lead to the splitting of more uranium nuclei is called a:
Fission products
Chain reaction
Isotopes
Neutrinos
- 3. Multiple Choice
The concentration of the lighter isotope of uranium, uranium-235, is vert low in nature relative to the abundance of the heavier uranium-238. In most modern reactors, the abundance of uranium-235 in the fuel needs to be enriched by a factor of:
2-3
11-18
130-235
4-7
- 4. Multiple Choice
If a nuclear reactor were to have a meltdown, radioactive materials could escape in the form of gases from the reactor into the atmosphere and harm humans and the environment. One safety system that might be able to prevent such an escape is a:
Centrifuge
Control rod
Containment building
Eectric turbine-generator
- 5. Multiple Choice
Plutonium is a radioactive material, exposure to which is hazardous to human health, and is one of the few materials that can be used to make a nuclear weapon. The time it takes for half of any initial quantity of plutonium to decay into stable non-radioactive products is roughly:
24 hours
24 days
24 years
24,000 years
- 6. Multiple Choice
What substance is used as a moderator to scatter and slow down neutrons just enough to increase their capture by Uranium and raise the rate of fission?
Graphite
Purified water
Uranium-238
Both A & B
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