One example of government control in Fahrenheit 451 is the mechanical hound. The mechanical hound is robot dog that can sense when someone is violating the law. Beatty got the hound so that they could find people that were hiding books. The mechanical hound is a sign of government control because it scares everyone into not having books so that they won't be killed by the dog.
Another example of government control is though books. This is a way the government controls everyone because they have banned books everywhere which stops everyone from learning and therefore, stops them from knowing what's going on in the world. This stops them from having a say in anything so they are easier to control.
One last way that the government controls people in this story, is through fear and intimidation. Montag is in fear for most of the story because he has books hidden away in his house, he is scared of the mechanical dog, and he ends up getting caught with books so he runs away. Montag was controlled through fear because of his job since he couldn't have books, but he had some anyway. When Captain Beatty got the mechanical hound, Montag also felt intimidated by it.