Which device enables fire fighters to ascertain the type and location of the activated alarm device?

Explanation:

The device that enables firefighters to ascertain the type and location of the activated alarm device is a fire alarm control panel (FACP) or a fire alarm control unit (FACU).

The FACP/FACU receives signals from individual fire alarm devices such as smoke detectors, heat detectors, and manual pull stations. When an alarm is activated, the FACP/FACU displays the information about the specific device that triggered the alarm, including its type and location.

For example, if a smoke detector in a particular room detects smoke, the FACP/FACU will show that the smoke detector in that room has been activated, helping the firefighters identify the location where the alarm was triggered.