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Idaho Class D Knowledge Practice Test
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Passing target: 85% (34/40)
Weather, Visibility & EmergenciesStandalone practice
You are sheltering in a car stranded in deep snow. What must you check before running the engine for heat?
Correct answer: Keep the exhaust pipe clear and let in fresh air
Why
Clear snow from the exhaust pipe and keep it clear. Provide ventilation and run the engine only intermittently as advised in the handbook. Carbon monoxide can be deadly, so do not rely on smell or assume snow cannot build up again.
Verified against Idaho Driver’s Handbook, July 2026 · Snow blocking the exhaust · p. 114
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