Depending on the league, a hockey team can dress anywhere from 18-22 players per game. Of that number, six are on the ice at any one time, usually one goalie, two defensemen and three forwards....
There are 5 people who "skate out" as it is called. They are the ones other than the goalies. There is one goalie on the ice per team. So the answer to your question is that unless there is a penalty...