Is there another site similar to yahoo answers?

yes, several

quora

blurtit

answerbag

answermug

there are many

the big difference is confirmed registration and invitation to many 

the anonymous feature  allows for opening thinking and blunt comments  but that leads TO STUPID HORDES as well 

but let me tell you 

these forums and comments are not saving the world. 

The Answerbank is a similar Q&A site.

Ask.fm 

Brainly 

Reddit... but Reddit is weird and really strict.

Your ability to both comment and ask are based on how long you've been a member and it's weird because one can't really build up a rhythm if they're already limited... even if they're willing to provide the input at a greater and/or even more useful rate than other more casual users. 

Reddit is the big one. 

There are plenty of others, but none that allow the level of trolling that yahoo did.

Yes it's the City Data boards site.

Yes there is Quora is Similar to Yahoo Answers 

There are a number of other Q&A sites out there. A quick search on question and answer websites provides a number of options. 

No, not of the same format type.