Question

Moderator is a substance that ..................... the neutrons in a nuclear reactor.

• A. Slow down
• B. Activates
• C. Both (a) and (b) above
• D. None of the above

Answer 1

The correct option is A Slow down

$\begin{array}{c}\text{Moderator in nuclear reactor are use to}\\ \text{slow down the neutrons. Generally we use}\\ \text{heavy water as moderator.}\\ \therefore \text{slow down is correct option.}\end{array}$