During identification, what are the two components required on an engine?

• A. Engine horsepower and weight
• B. Initial and number of the engine
• C. Train name and road number
• D. Crew initials and route

Answer: (B)

The main idea is how locomotives are uniquely identified. You need two things: the engine’s initials (the operator’s reporting marks) and its road number. The initials show who owns or operates the locomotive, while the road number uniquely identifies that specific engine within that operator’s fleet. This combination lets dispatch, maintenance, and yard personnel pinpoint the exact locomotive referenced, regardless of which train it’s attached to. Engine horsepower or weight aren’t unique identifiers for a specific locomotive, and train name or route, or crew initials, don’t identify the engine itself.