I'm not DrugDoc, but a classmate, so I'll toss in my 2 cents for what they're worth.
I work Mon, Tue, and Wed mornings at a hospital from 7 am to 1 pm. I get home around 1:30 on those days and listen to or watch lectures for about 2 hours, until I pick my daughter up from school. I hit the books again around 7 pm or so until I've finished what I need for the day. I don't work Thur or Fri at all, so I usually spend all day on lectures and assignments as necessary. I'm usually online for at least a couple of hours a day (usually more!) on both Sat and Sun, depending on workload. For fall, we seemed to go a couple of weeks with no exams/assignments, etc. and then we would have 8 exams in 3 weeks. I have found that I do better prioritizing on a week to week basis depending on upcoming assignments as opposed to having a rigid pre-set time for each class.
For exams, we go to a proctored, 3rd party site (like a testing center at a college or a Sylvan learning center). All major exams are at the testing site, but we do have some quizzes that are on your honor at home. You typically get a timeframe of 24-36 hours in which to schedule and take the exam (say from 8 am on Monday until 5 pm on Tuesday) and we get our exam schedules at the beginning of the semester for planning purposes.
And finally, great insights (as always!) from Ominone - I second everything he said!