What type of information does a fire sprinkler system's flow test provide?

A fire sprinkler system's flow test is crucial for assessing the available water supply and pressure, which are essential for effective firefighting. This test measures the flow rate and pressure produced by the water supply under specific conditions, simulating what would happen during an actual fire incident.

Understanding the available water supply helps determine whether the system can deliver sufficient water to effectively suppress a fire, ensuring proper sprinkler performance and compliance with fire safety standards. This information is vital for both design considerations of the system and for firefighters responding to an emergency.

The other options focus on different aspects of fire safety. Potential hazards in the building relate more to risk assessment and inspections rather than flow tests. The location of fire exits pertains to egress planning and occupant safety, and the type of sprinkler heads installed is a matter of system design but not directly measured by a flow test. Thus, the flow test specifically informs about the capacity and adequacy of the water supply for firefighting purposes.