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- 1. Multiple Choice
Time taken for a sample of radioactive nuclei to decay to half of its initial number is known as
Half Time
Half Life
Radioactivity
Uranium -235
- 2. Multiple Choice
If the ratio of Pb : U is 3:1 , it is means that
there is 25 % of Pb and 75 % of U
there is 25 % of decayed nuclei and 75 % of undecayed nuclei
undergoes 2 half life
undergoes 3 half life
- 3. Multiple Choice
A sample of radioactive material stored in the laboratory has an initial activity of 480 s(-1). its half life is 6 minutes, how much is it activity after 30 minutes?
5 s^(-1)
15 s^(-1)
150 s^-1
- 4. Multiple Choice
....................................... is aprocess of unstable nucleus becomes more stable by emitting radioactive radiation.
half life
Beta particle
Radioactive decay
Nuclear Energy
- 5. Multiple Choice
................... atomic energy released during nuclear reaction such as radioactive decay, nuclear fission and nuclear fusion
Fission Energy
Fusion Energy
Nuclear Energy
Radioactive Energy
- 6. Multiple Choice
Nuclear Fission is ..............
atomic energy, released during nuclear reactions such as radioactive decay, nuclear fission and nuclear fusion.
a nuclear reaction when a heavy nucleus splits into two or more lighter nuclei while releasing a large amount of energy
a nuclear reaction in which small and light nuclei fuse to form a heavier nucleus while releasing a large amount of energy.
- 7. Multiple Choice
Boron or cadmium place in nuclear reactor , function as
Moderator
cooling agent
control rod
- 8. Multiple Choice
The purpose of control rod in nuclear reactor is ............
Slow down the fast moving neutrons
Absorbing excess neutrons in order to control reaction rate
used as fuels for producing nuclear energy
- 9. Multiple Choice
which of the material below used as moderator in nuclear reactor
Graphite
Boron
Cadmium
Uranium
- 10. Multiple Choice
Which of the statement below, explain about the function of moderator.
prevent radioations from leaking
Slow down the fast moving neurons
Control the reactor temperature
- 11. Multiple Choice
The equation is related to ....
Nuclear fusion
Nuclear fission
Nuclear Fisfusion
- 12. Multiple Choice
The equation related to
Nuclear fission
Nuclear fusion
Radioactive decay
Radioactive energy
- 13. Multiple Choice
This equation related to .............
Nuclear Fission
Nuclear Fusion
Nuclear Decay
Radioactive Decay
- 14. Multiple Choice
Why nuclear reactor were built near sea or lake ?
easy access to cooling agent
easy to dump the waste
more covinient for the worker
- 15. Multiple Choice
A nuclear reaction is represented by the following equation: (Picture). The mass defect is 0.19585 amu. Calculate the energy that is released by the reaction.
2.93 × 10^(–11) J
4.95 × 10^(–11) J
6.93 × 10^(–11) J
- 16. Multiple Choice
Radium-226 has a half-life of 1 600 years. What percentage of the sample of radium-226 will be left after 8 000 years?
25%
3.125%
50%
6.25%
- 17. Multiple Choice
How is nuclear energy produced in a reactor?
The chain reaction resulting from neutron bombardment on the uranium-235 nuclei produces a large amount of nuclear energy in the reactor.
Hidrogen -2 fuse with Hidrogen-3 producing He , neutron and energy release.
unstable nucleus becomes more stable by emitting radioactive radiation.
- 18. Multiple Choice
How is heat energy converted to kinetic energy in the rotation of a turbine in a nuclear reactor ?
Heat energy boils the cold water. The low pressure steam produced is capable of rotating a turbine at low speed.
Heat energy boils the cold water. The high pressure steam produced is capable of rotating a turbine at extremely high speed.
Chain reaction cause difference in pressure, thus force is produced to rotate the turbine.
- 19. Multiple Choice
Safety precautions and work procedures in accordance to (IAEA) standards must be comply during the operation of nuclear power plant.
IAEA stands for ..........
International Atomic Energy Agency
International Atomic Enstein Agency
International Advanced Energy Agency
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