Canadian National Railroad Practice Exam

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

Engine type and serial Train name and road number Initials and route Initial and number of the engine

Correct Answer:

Initial and number of the engine

Explanation:

Locomotive identification relies on the railroad’s initials (the reporting mark) and the engine’s road number. The initials show which railway owns or operates the locomotive, while the number uniquely identifies that specific unit within that railroad’s fleet. This pairing provides a single, unambiguous reference across the network for dispatching, maintenance records, and safety communications. Other schemes, like engine type and serial or train name with a number, don’t offer the same nationwide uniqueness or practical use in daily operations. So the standard identification used for trains and engines is the initial and number of the engine.

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