| Date | May 2012 | Marks available | 1 | Reference code | 12M.1.SL.TZ2.24 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 24 | Adapted from | N/A |
Question
Which of the following is the primary function of the moderator in a nuclear power station?
A. To control the rate of fission reactions
B. To absorb neutrons
C. To prevent the power station from becoming unsafe
D. To slow down neutrons
Markscheme
D
Examiners report
Many candidates clearly did not understand the role of the moderator in a nuclear power station.
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