A vocal-auditory speaker asks a question with a certain vocal tone. On the other hand, a visual-manual speaker asks a question with a certain facial tone with or without the signed word "Q" or "question" (as illustrated below).
The signed question above is called a wiggling question marker or "wg-q" and its variants used in glossing.
Not all questions end with this signed word -- wiggling question. Facial grammar or non-manual tone can indicate a question.
A yes-no question is usually accompanied with the raised brows, widened eyes and forward-tilted head. Sometimes, holding the last sign-word at the end of sentence also anticipates an answer. In some contexts, the yes-no questions also occur with the downward brows.
A wh-question is referred to when, what, why, who, how, and where questions. The brows are usually burrowed, accompanied with the wh-question sign in a wh-question sentence. Holding the last word/sign at the end of a sentence also may indicate a question (waiting for a response).
A rhetorical question is more of a statement using the wh-question type. It is not a true question, yet it is a way of pulling a listener's attention by asking a question and then answering. The signer does not expect the listener to respond.
Unlike the wh-question, the brows are raised when signing a rh-question sign. The rh-question signs also function as conjunctions.