Multiple choice

The wheels are coned to prevent from rubbing the inside face of the rail head and to prevent lateral movement of the axle with its wheels. The slope of the cone is

  1. 1 in 5

  2. 1 in 20

  3. 1 in 10

  4. 1 in 15

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The standard coning slope for railway wheels is 1 in 20, which means for every 20 mm of horizontal distance, the tread rises 1 mm. This slight taper (approximately 2.86 degrees) helps maintain wheel centering, reduces flange contact, and improves ride quality. The 1 in 5 slope is too steep, while 1 in 10 and 1 in 15 are not standard values.