Iowa CDL Practice Test
Free practice test with 45 questions covering general knowledge and air brakes. Pass score in IA: 80%.
Iowa CDL Test Requirements
Passing Score
80%
Questions on Test
50
Test Fee
$8
Renewal Period
5 years
Minimum Age
18
Answers to Pass
40/50
IA Note
Iowa DOT offers CDL testing at county treasurer offices (knowledge) and designated sites (skills). Iowa has one of the lowest CDL test fees in the nation. The CLP must be held for 14 days.
Iowa CDL Practice Questions
Answer all 45 questions below. You need 80% correct to pass based on Iowa's requirements.
According to FMCSA regulations, what is the maximum number of hours a property-carrying driver can drive after 10 consecutive hours off duty?
Iowa CDL Test FAQ
How much does the CDL test cost in Iowa?
The CDL test fee in Iowa is $8. This typically covers the knowledge test. Skills test fees, endorsement fees, and the license issuance fee may be additional. Contact your local IA DMV or driver license office for the most current fee schedule.
What score do I need to pass the CDL test in Iowa?
Iowa requires a passing score of 80% on the CDL knowledge test. With 50 questions on the test, you need at least 40 correct answers to pass.
How often do I need to renew my CDL in Iowa?
In Iowa, a CDL must be renewed every 5 years. You will need a valid medical examiner's certificate on file with the IA DMV. Some endorsements like HazMat require more frequent renewal and background checks through TSA.
Can I get a CDL at 18 in Iowa?
Yes, Iowa allows drivers to obtain a CDL at age 18 for intrastate (within-state) driving. However, you must be at least 21 years old to drive interstate (across state lines) per federal FMCSA regulations.
How do I prepare for the Iowa CDL knowledge test?
Start by studying the IA CDL manual from your state DMV. Then practice with our free online tests covering general knowledge (30 questions) and air brakes (15 questions). Focus on Hours of Service rules, pre-trip inspection procedures, air brake systems, and cargo securement. Take the practice test multiple times until you consistently score above 80%.