Practice question

What is the main danger of using a retarder (such as an engine brake) on slippery or icy roads?

  1. It can cause the drive wheels to lock up and result in a skid
  2. It can cause the engine to overheat
  3. It reduces fuel efficiency significantly
  4. It damages the transmission system

Answer: A — It can cause the drive wheels to lock up and result in a skid

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