How many personnel can ride in the engine at one time?

The correct answer indicates that four personnel can ride in the engine at one time, which aligns with standard fire engine staffing protocols. A typical fire engine configuration often includes the driver, an officer (usually the lieutenant), and two firefighters. This setup allows for efficient response times and adequate manpower for initial firefighting efforts upon arrival at an incident scene. It's important to recognize that staffing levels can differ based on the fire department’s policies or the specific type of engine used, but commonly four personnel is a practical and effective number for operational effectiveness while ensuring safety and coordination.