Certified Floodplain Manager (CFM) Practice Exam

A Datum in relation to FEMA 480 refers to a common vertical reference point that is used to measure flood levels. This is typically a benchmark or a fixed point on a structure that stays consistent even during a flood event. The other options, while they may relate to flood hazards, do not specifically pertain to a Datum as it is defined in relation to FEMA 480. A detailed flood hazard map may be used to identify potential flood-prone areas, but it is not a Datum. The rate of water discharge is a measurement of how much water is flowing at a certain point, but it is not necessarily a Datum. A type of flood-resistant material may be used to protect buildings from flood damage, but it is not a Datum. Therefore, B A common vertical reference point is the correct answer.