Q. In the nuclear reactors, moderators are used to:
Answer: Slow down the neutrons
Notes: A moderator is a medium that reduces the speed of fast neutrons, thereby turning them into thermal neutrons capable of sustaining a nuclear chain reaction involving uranium-235. Commonly used moderators include regular (light) water (roughly 75% of the world's reactors), solid graphite (20% of reactors) and heavy water (5% of reactors).

This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app. Question Number: 96 in General Studies Mock Test - 2 in above course in App.