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FREE Iowa CDL General Knowledge Practice Test 1 2026

49
Questions
39
To pass
37
Min to pass

Covers the FMCSA General Knowledge core every IA CDL applicant is tested on - 49 questions on vehicle inspection, basic control, and safe driving practices, with 39 correct to pass.

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Iowa Official CDL Handbook
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A tractor-trailer 'jackknife' happens when:

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Iowa CDL General Knowledge Practice Test 1: what to expect and what trips drivers up

Start your preparation here with the flagship Iowa CDL practice test, the free CDL practice test that mirrors the real general knowledge exam question for question. Whether you searched for a DMV CDL practice test, a CDL practice test online, or an Iowa CDL permit test, this is the same exam: the written knowledge test you pass to earn your Commercial Learner's Permit, the credential most people call the CDL permit. Learning how to get your CDL permit begins with mastering exactly this material.

How many questions are on the Iowa CDL general knowledge test? There are 50 questions, and you need to answer 40 of them correctly, an 80 percent score, to pass. That standard comes from the federal FMCSA and holds true in every state. Iowa's freight runs heavily on agriculture, so grain and co-op loads moving from farm to elevator and ethanol shipments along the I-80 corridor put a premium on the core skills this Iowa CDL practice test drills.

Treat the Iowa CDL Manual from the Iowa DOT as your source of truth and score each attempt like the real thing, and this free CDL practice test will turn the general knowledge exam into a formality. Run it until 80 percent feels easy, then move on to the next practice test with momentum on your side.

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Every question traces back to the Iowa CDL Manual - skim the right-of-way and signs chapters before your retake.

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🎓 Exam Mode - just like the real thing

  • ⏱ 37-minute timer, same as your DMV
  • 🙈 No hints, no instant feedback
  • 🔀 Questions come in random order
  • ❌ More than 10 mistakes ends the exam - like the real one
  • 💾 Your practice progress on this test stays saved

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