Topic 4 · Defensive Driving and Safe Driving Practices
Tiredness, yawning, dizziness, nausea, headache and ringing in the ears while driving may be signs of:
- Carbon monoxide poisoning, so you should have the exhaust system checked — correct answer
- A fault in the air conditioning filter
- Normal fatigue that a coffee will fix
Why
Those are the symptoms the handbook lists for carbon monoxide poisoning, and the advice is to have your exhaust system checked. (Section 8, Be Aware of Carbon Monoxide.)
Practise this in the real format
Reading one answer is not the same as sitting the test. The simulator runs the first-time adult form: 36 questions, 6 mistakes allowed, 83% to pass.
Source: California Driver's Handbook (DL 600, rev. 6/2025), the document the DMV writes the real test from. Edited by Fernando Aguilera. Aprobify is not affiliated with the California DMV.
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