Is an atomic bomb an example of controlled fission?

No it is not.





In a bomb the chain reaction is not controlled. This is why it is explosive.





An example of controlled fission is in a reactor or atomic pile. In a reactor the speed and quantity of neutrons are moderated to keep the fission of uranium or plutonium atoms controlled. The reactor can be throttled, speeding up or slowing down the rate of fission. Because the fuel is not concentrated in a critical mass the reaction cannot go uncontrolled and explode as in a bomb.





In a reactor the worst that can happen is an overheating which results in a melt down. If the reactor is in a containment housing this creates a mess but should not result in injury or loss of life. If there is no containment housing the radiation release can be catastrophic.Is an atomic bomb an example of controlled fission?
It's fission, yes, also some fusion in there.


I wouldn't say controlled though, because it's a violent chain reaction of neutrons inducing fission in successive nuclei and so on.Is an atomic bomb an example of controlled fission?
Atomic Bomb: is uncontrolled fission


Nuclear Power Station : Controlled Fission