I haven't seen this discussed anywhere, and finding out after-the-fact is not an option, so I'm throwing this out there:

Is there a word/character limit in answers to an essay question in a quiz? I'm not expecting students to produce a 50,000-word dissertation in the time they have, but I'm wondering if there is a ceiling that I should be concerned with should a prolific thinker and fast typer produce a 5,000-word essay...