Which action completes the 11-3 crossover?

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Study for the Union Pacific (UP) Return to Work Exam. Prepare with flashcards and multiple-choice questions. Each question comes with hints and explanations. Get ready for your test!

Multiple Choice

Which action completes the 11-3 crossover?

Explanation:
Finishing the throw of the movable frog completes the crossover by exactly aligning the rails at the crossing so a train can smoothly move from one track to the other. In an 11-3 arrangement, the rails must be in a precise position for the wheels to ride over the frog without a derailment. If you only operate the first switch, or move the frog halfway, or reset everything to normal, the crossover isn’t actually finished—the rails aren’t in the proper continuous alignment, which can cause misrouting or derailment. Finishing the frog throw is the step that makes the crossover fully functional and safe to use.

Finishing the throw of the movable frog completes the crossover by exactly aligning the rails at the crossing so a train can smoothly move from one track to the other. In an 11-3 arrangement, the rails must be in a precise position for the wheels to ride over the frog without a derailment. If you only operate the first switch, or move the frog halfway, or reset everything to normal, the crossover isn’t actually finished—the rails aren’t in the proper continuous alignment, which can cause misrouting or derailment. Finishing the frog throw is the step that makes the crossover fully functional and safe to use.

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