Newfoundland and Labrador Permit Test Coach
Safe drivingQuestion 287 of 288

Which tire pressure problem is a serious safety hazard?

  1. Over-inflated by more than 5 kPa.
  2. Under-inflated by more than 5 kPa.
  3. Over-inflated by more than 10 kPa.
  4. Under-inflated by more than 27.5 kPa.
Show answer

Correct answer: Under-inflated by more than 27.5 kPa.

Low pressure can cause tire damage and loss of control.

Source: Driver's Handbook (Government of Newfoundland and Labrador, January 2025), Maintaining your vehicle, page 129

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Questions last reviewed: 18 October 2026