A:
You may usually ask questions when the floor is unassigned, especially when they are relevant to a report just delivered (such as questions about zoning after a report on building expansion).
If there has been no such opportunity during a meeting, questions should be welcome at the end during an optional agenda item called "Good of the Order" or during "Announcements."
Address your questions to the chair.
For example: "Madam President, has the chairman of the Grievance Committee had an opportunity to look into the problem of the stray cats?"
See RONR pp. 285-86.