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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
What braking redundancy is required on an ordinary motor vehicle other than a motorcycle?
Correct answer: Two separate means of braking, so one failure still leaves brakes.
Why
Iowa requires adequate brakes plus a backup means that preserves braking on at least two wheels after a component failure.
Verified against Iowa Driver's License Manual · Braking System · p. 23
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