What will occur when the ENG FIRE switch is activated?

When the ENG FIRE switch is activated, a series of safety procedures are initiated to protect the aircraft and its systems from the potential dangers of an engine fire. The correct answer details these critical actions.

Activating the ENG FIRE switch triggers the closure of the fuel shutoff valve (SOV) to prevent fuel from feeding the fire. It also leads to the closure of both the Intermediate Pressure (IP) and High Pressure (HP) bleed-air shutoff valves, which stops the bleed air supply that could help sustain a fire. Additionally, the hydraulic shutoff valves close to isolate hydraulic systems associated with the affected engine, minimizing the risk of further complications. The generator linked to the engine is also selected offline, cutting off electrical power from the engine, which is crucial for ensuring that any electrical components or systems involved do not contribute to the fire.

These actions are designed to comprehensively respond to an engine fire situation, prioritizing safety and preventing any escalation of the situation. Other options do not encompass the full range of protective measures enacted by the ENG FIRE switch, thus making them less accurate in describing the procedure.