Which component is the wheel-axle assembly under a rail vehicle that supports and allows steering around curves?

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Multiple Choice

Which component is the wheel-axle assembly under a rail vehicle that supports and allows steering around curves?

Explanation:
A bogie is the wheel-axle assembly mounted on a frame that can pivot under the vehicle. This pivoting lets the wheels follow curves smoothly, distributing weight and keeping the car stable as it negotiates bends. The wheelset—the two wheels on an axle—is the component contained within the bogie, but by itself it doesn’t steer; the steering comes from the bogie’s ability to pivot relative to the car body. The other terms refer to operations, not hardware: dwell time is how long a train stays at a station, and timetable is the schedule.

A bogie is the wheel-axle assembly mounted on a frame that can pivot under the vehicle. This pivoting lets the wheels follow curves smoothly, distributing weight and keeping the car stable as it negotiates bends. The wheelset—the two wheels on an axle—is the component contained within the bogie, but by itself it doesn’t steer; the steering comes from the bogie’s ability to pivot relative to the car body. The other terms refer to operations, not hardware: dwell time is how long a train stays at a station, and timetable is the schedule.

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