First of all you have to sign in.
Then you simply have to answer ten questions under the same category that you want to be a moderator for.
If there is no question to answer then you can make your own questions then answer them.
Your answers have to get approval from an administrator or higher rang.
You can moderate as many categories you want to, simply ask ten question for each.
You need ten question that that must be approved.
So don't be silly and give "bad" answers.