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Louisiana Class E Knowledge Test Practice
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Weather, Visibility & EmergenciesStandalone practice
Why is running a vehicle in a closed garage dangerous even if its engine sounds normal?
Correct answer: Exhaust can allow poisonous carbon monoxide to accumulate.
Why
Do not run the engine in an enclosed space such as a closed garage. Carbon monoxide in exhaust is poisonous and may not give a reliable smell warning. Maintain the exhaust system and use ventilation precautions; do not rely on comfort or engine sound as proof of safety.
Verified against Louisiana Class D & E Driver’s Guide, DPSMV2052 R08/25 · Carbon monoxide · p. 124
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