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Iowa Class C Knowledge Test Practice
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Passing target: 20/25 correct (TLA practice target)
Vehicle Safety, Documents & TowingStandalone practice
Why must you avoid leaving a running vehicle in an enclosed garage?
Correct answer: Exhaust has poisonous gas you cannot rely on smell to detect.
Why
Keep the exhaust system in good condition and avoid running an engine in an enclosed space. Carbon monoxide is poisonous and cannot be detected reliably by sight or smell. Do not remain where exhaust can accumulate.
Verified against Iowa Driver's License Manual and current primary rules · Exhaust in an enclosed garage · p. 25
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