Practice question

What is an auxiliary engine retarder (e.g., Jake Brake, exhaust brake, or hydraulic retarder) and when should it be switched off or reduced?

  1. A device that sprays water on the windshield; switch off in rain
  2. A supplementary braking system that uses engine compression or drivetrain resistance to slow the vehicle; switch off or reduce setting on wet, icy, or slippery roads
  3. A device that increases engine turbocharger boost
  4. A mechanism to lock the trailer wheels during high-speed highway cruising

Answer: B — A supplementary braking system that uses engine compression or drivetrain resistance to slow the vehicle; switch off or reduce setting on wet, icy, or slippery roads

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