Which phrase correctly states the required identification for trains and engines?

• A. Engine serial and model
• B. Initials of crew and engine number
• C. Engine number and road name
• D. Initial and number of the engine

Answer: (D)

In railroad practice, trains and engines are identified with a concise tag that combines the road’s initials with the engine’s number. This pair uniquely identifies a specific locomotive across crews, yards, and dispatching, and it stays consistent even as crews change. The initials tell you which railroad owns or operates the engine, and the number distinguishes the particular unit within that road’s roster. For example, a tag like CN 5803 clearly identifies locomotive 5803 on the Canadian National system. This approach is favored because it’s quick to read, unambiguous, and widely used in communications and records.