What must the driver do if a building's fire pump fails?

When a building's fire pump fails, supplying the required pressure becomes a critical response for the driver engineer. Fire pumps are essential for providing the necessary water pressure for firefighting operations, and their failure means that alternative measures must be taken to ensure that crews can still perform their lifesaving tasks effectively.

By supplying the required pressure, which may involve using a fire apparatus with its onboard pump, the driver ensures that water is delivered to the firefighting efforts without significant delay. This action helps maintain operational integrity and leverages the resources on hand to compensate for the failing system. Being proactive in this way is crucial in emergency situations where every second counts, and ensuring adequate water supply can make the difference in controlling and extinguishing a fire.

Addressing the other options, while calling for additional support may be necessary in certain situations, it does not provide an immediate solution to the failed fire pump. Activating the fire alarm system is standard procedure but does not resolve the issue of water pressure. Notifying the fire chief is important for situational awareness and command structure but does not directly mitigate the challenges posed by the pump failure. Therefore, focusing on supplying the required pressure is the most immediate and effective action the driver engineer can take in this scenario.