Q.

The moderator used in a nuclear reactor is –

A. Uranium
B. Radium
C. Ordinary water
D. Graphite
Answer» C. Ordinary water
Explanation: Light water (ordinary water) is used as the moderator in U.S. reactors as well as the cooling agent. It acts as the means by which heat is removed to produce steam for turning the turbines of the electric generators.
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