What makes you angry?
Being moralized about something, especially when the other person claims their morals to be the right ones.
Arrogance.
Being talk down to.
People who don't even try to take responsability for their actions.
Manipulation and hurting other people for someone's own good.
Not even trying to concider others.
When people try to make me do things because they are "for my own good", when I know that NO they aren't, but I can't really answer back.
Do you get angry often?
Rarely. I do get annoyed pretty often. Sometimes that's worse.
How do you deal with the problem?
a) Seethe quietly and get passive-aggressive.
b) Try to reason it out. Or try to ignore it.
c) Construct a long calm logical response. Aka you are wrong. Period. This is a warning. Next I'll rip you apart and am now quietly awaiting for you to give me justification to do that, to be morally allowed to do that. Go on.

(At this point the people who know me have noticed the warning sings and try to drag me away even though I'd like to stay and start ripping the other person mentally apart.)
d) Completely explode.
How quick are you to resolve this emotion?
Sometimes quickly, but if it continues I will be seething for a loooong time. At worst I'm angry about something that has happened about 15 years ago.
When you get angry, are your friends and family generally surprised at the content that makes you so?
Family (not including father) and best friend + two close friends aren't usually surprised, there are times when they look at me baffled though. Everyone else, also some other friends: yes, absolutely.