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Iowa Class C Knowledge Test Practice
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Passing target: 20/25 correct (TLA practice target)
Licensing & Test ReadinessStandalone practice
For how long is an Iowa knowledge-test score result valid under the current examination rule?
Correct answer: 180 days.
Why
A knowledge-test score result is valid for 180 days. This is the score’s validity, not the length of an instruction permit. DOT determines the live test’s minimum passing score; a practice quiz’s chosen format does not establish it.
Verified against Iowa Driver's License Manual and current primary rules · How long a knowledge score lasts · p. 5
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