Newfoundland and Labrador Permit Test Coach
Alcohol, drugs and penaltiesQuestion 74 of 288

What does an ignition interlock device do?

  1. It records your speed on each trip.
  2. It locks the doors while you drive.
  3. It limits your engine power at night.
  4. It stops the car starting if you drank.
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Correct answer: It stops the car starting if you drank.

You blow into the device first. The engine will not start if it finds alcohol.

Source: Driver's Handbook (Government of Newfoundland and Labrador, January 2025), Ignition interlock, page 39

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Questions last reviewed: 18 October 2026