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Air Brake (Q Endorsement) Practice · Question

Upon starting a commercial vehicle, how should the ABS indicator lamp behave for the tractor?

When the ignition is turned on, the tractor's ABS indicator lamp should light up for a few seconds as part of a self-test and then go out, indicating the system

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Question: Upon starting a commercial vehicle, how should the ABS indicator lamp behave for the tractor?

Answer options: ✅ It should illuminate briefly and then extinguish.

  • It should remain illuminated continuously.
  • It should flash repeatedly.
  • It should never illuminate.

Correct answer: It should illuminate briefly and then extinguish.

Explanation: When the ignition is turned on, the tractor's ABS indicator lamp should light up for a few seconds as part of a self-test and then go out, indicating the system is functional, as described in Canadian air brake manuals.

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