In standard identification, which two elements are recorded for a train's engine?

• A. Vehicle type and owner name
• B. Engine number only
• C. Initial and number of the engine
• D. Crew initials only

Answer: (C)

Locomotive identification uses a two-part tag: the initial (which marks the engine’s series or road code) together with the engine number (the unit’s unique sequence within that series). This combination creates a unique identity for each engine, so records, logs, dispatching, and maintenance can unambiguously reference a specific locomotive even if numbers collide across different series or roads. The number alone can clash between different engine groups, and other data like vehicle type, owner, or crew initials don’t provide a precise, consistent identifier for the engine itself.