Western Australia · Theory Test (CTT) · Road rules

Going without sleep for 17 to 18 hours affects your driving like what blood alcohol level?

The answer

  • 0.02 per cent
  • 0.05 per cent Correct
  • 0.08 per cent
  • It has no measurable effect

Why that's the answer

Without sleep for 17 to 18 hours your ability to drive is the same as if you had a BAC of 0.05 per cent — well over the 0.00 per cent limit that applies to a novice driver.

Where this rule comes from

Take the full Western Australia practice test (95 questions)

More WA Learners questions

Same topic first — road rules trips up more learners than any single rule.

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