If a flat spot on a wheel of a car or engine develops en route, a member of the crew must?

If a flat spot on a wheel of a car or engine develops en route, a member of the crew must?

• A. Inspect it
• B. Replace the wheel
• C. Stop service and eject
• D. Ignore it

Answer: (A)

When a wheel shows a flat spot, the first and most important action is to inspect it. A flat spot can signal wheel damage, out-of-round condition, or overheated metal, all of which can lead to more serious problems or a derailment if the train continues without checking. By inspecting, the crew can assess the severity—looking for cracks, unusual wear, or bearing issues—and determine whether the train should slow down, stop at a safe location, or arrange for appropriate maintenance. Replacing the wheel or stopping the service entirely aren’t the immediate required steps on sight of a flat spot; those decisions depend on what the inspection reveals. Ignoring the issue is unsafe, and taking drastic action without understanding the condition isn’t appropriate. The key is to inspect first to decide the safe course of action.

When a wheel shows a flat spot, the first and most important action is to inspect it. A flat spot can signal wheel damage, out-of-round condition, or overheated metal, all of which can lead to more serious problems or a derailment if the train continues without checking. By inspecting, the crew can assess the severity—looking for cracks, unusual wear, or bearing issues—and determine whether the train should slow down, stop at a safe location, or arrange for appropriate maintenance.

Replacing the wheel or stopping the service entirely aren’t the immediate required steps on sight of a flat spot; those decisions depend on what the inspection reveals. Ignoring the issue is unsafe, and taking drastic action without understanding the condition isn’t appropriate. The key is to inspect first to decide the safe course of action.