The main reason railroad trains remain on their tracks has to do with the ____________________. A) None of these.B) beveled shape of the wheel circumference.C) independence of opposite wheel motions.D) All of these.

E) flange on their wheels.

The flange keeps the wheels on the track when negotiating a curve. The beveling effectively provides slightly different diameters so that the inside and outside wheels can move at slightly different speeds on curves, so that a differeential is not needed. See

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The main reason why railroad trains remain on their tracks is because of the flange on their wheels. The correct answer is option E.

To understand why the flange on the wheels is the main reason, here's an explanation:

When a train runs on a track, the flange on the inner side of the wheels keeps the train aligned and prevents it from derailing. The flange is a raised rim located on the inside of the wheel. It provides stability and keeps the train centered on the track.

The beveled shape of the wheel circumference (option B) and the independence of opposite wheel motions (option C) are also important factors that contribute to this stability. The beveled shape of the wheel circumference helps to guide the train along the track, while the independence of opposite wheel motions allows each wheel to adapt to variations in the track's contour.

Therefore, option D (All of these) would also be an accurate answer since all of the factors mentioned in options B, C, and E play a role in keeping the train on its tracks.