How can you identify the #1 end of a C car on PA5s?

Identifying the #1 end of a C car on PA5s is primarily determined by examining the door numbers and the alarmed enclosure. Each PA5 car has specific door numbering that is consistent across all cars, allowing engineers and personnel to accurately identify the front or #1 end. The alarmed enclosure, which houses safety features and emergency equipment, is also positioned at the #1 end, serving as an additional indicator.

The other options, while they may offer some information, do not provide the clarity necessary for identification. The color of the train may not be unique to a specific end, and the placement of wheels is standardized across the cars, making it unhelpful for determining end identification. Engine sounds can vary based on operational conditions and may not consistently indicate the orientation of the car. Therefore, relying on the door numbers and alarmed enclosure is the most reliable method for distinguishing the #1 end of a C car.