CDL Practice Tests — Iowa
Free practice tests for the Iowa CDL exam, written from the Iowa Department of Transportation handbook and federal standards.
Official handbook: Iowa Department of TransportationChoose a practice test
General Knowledge
50-question practice · 50-question mock exam · 80% to pass
IowaAir Brakes
25-question practice · 25-question mock exam · 80% to pass
IowaCombination Vehicles
20-question practice · 20-question mock exam · 80% to pass
IowaHazardous Materials
30-question practice · 30-question mock exam · 80% to pass
IowaTanker
20-question practice · 20-question mock exam · 80% to pass
IowaDoubles and Triples
20-question practice · 20-question mock exam · 80% to pass
IowaPassenger Transport
20-question practice · 20-question mock exam · 80% to pass
IowaSchool Bus
20-question practice · 20-question mock exam · 80% to pass
Step-by-stepIowa CDL Licensing Guide
How to get licensed in Iowa, step by step.
About the Iowa CDL exam
The Iowa CDL exam is administered by the Iowa Department of Transportation. Like every state, Iowa adopts the federal standards as a baseline and adds state-specific requirements, fees, and procedures.
- Exam / licence fee: approximately $26.
- Skills testing: Iowa DOT driver's license stations.
- Iowa's agricultural exemption is notably broad, covering farm-to-market hauls within 150 air miles that other states restrict more tightly.
To get started, read the official Iowa handbook (linked above), practice with the tests on this page until you consistently score above 80%, and then schedule your exam with the Iowa Department of Transportation.
What's in the Iowa exam: Practice tests for the Commercial Driver's License written exam. Questions reflect the Federal Motor Carrier Safety Administration (FMCSA) Commercial Driver's License Manual that all states adopt as the basis for their CDL exams.
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Complete prep for all CDL written tests: general knowledge, air brakes, combination vehicles, hazmat, and all endorsements. Includes full-length practice tests.
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Check Price →As an Amazon Associate, CJ Affiliate, and AWIN publisher we earn from qualifying purchases. Links above are affiliate links. Full disclosure →
Practice test FAQs
How do I get a CDL license in Iowa?
In general you must meet the eligibility requirements, complete any required education or training, and pass the required knowledge test (and, where applicable, a skills test) administered through the Iowa Department of Transportation. The exact steps, fees, and documents are set by Iowa and are covered in the guide above.
Is the CDL exam different in Iowa?
The core knowledge tested is similar across states, but Iowa sets its own specific rules, procedures, passing requirements, and any state-law content. That is why it is important to study materials specific to Iowa, which our CDL practice tests are written to reflect.
Are these Iowa practice tests free?
Yes. All of our Iowa CDL practice questions are completely free, with no sign-up or payment required, and every question includes a full explanation. You can start practicing immediately on desktop or mobile.
How should I prepare for the CDL exam in Iowa?
Study the official CDL materials from the Iowa Department of Transportation, focus on the most heavily tested topics, and take practice tests until you consistently score above the passing threshold. You can start with the Iowa CDL practice tests for this state.
Where can I learn more about the CDL exam format and scoring?
Our CDL exam guide explains the test format, scoring, what is covered, and study strategies that apply in every state, including Iowa.