When it says ask something only once does that me i cant ask similar questions
If you ask "When did Abraham Lincoln die?" and then submit another question, "How did Abraham Lincoln die?" followed by "Where did Abraham Lincoln die?"... then these question will probably be flagged. Please use your best judgement to clear and succinct with what you are asking so you only need to ask it once - with out a long, rambling description.
absolutely notit would actually depend on the degree of similarity.