Multiple choice

Wear on top or head of rail occurs due to

  1. abrasion of rolling wheels

  2. heavy axle load

  3. constant brake application

  4. any or all of the above

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

Rail head wear is a complex phenomenon caused by multiple factors: abrasion from rolling wheels (friction wear), heavy axle loads (increasing contact stress), and constant brake application (creating friction and heat). All three mechanisms contribute to wear on the running surface of the rail, making 'any or all of the above' the correct answer.