Prince Edward Island Knowledge Test — Instruction Permit Practice Question
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Accuracy —
Rules of the Road
To quickly defog your PEI vehicle's windshield on a cold morning:
Show Answer & Explanation
Correct Answer: B. Use the defrost setting with AC on (dries air) and warm gradually as the engine warms up
Rapid temperature changes can crack cold glass; AC removes moisture that causes fog.
Why the other answers are wrong
- A.Turn heat to maximum immediatelyMax heat immediately can thermal-shock cold glass.
- C.Open all windowsOpen windows can actually increase frost accumulation with cold humid air.
- D.Rub the glassRubbing creates smears that worsen visibility.
