CDL Practice Test
0 of 40 questions completed
Below are practice questions for the Iowa CDL test. The site is free and you are able to take the practice test as many times as you need to as you prepare to obtain your Iowa CDL. The questions and answers covered in these Iowa practice CDL tests are taken from the Iowa DOT CDL manual. You will be presented with 40 questions and you must answer 34 questions correctly to pass. There is a 50-minute time limit. You may not go back once you answer a question. Click the “Start Test
” button below to begin.
You have already completed this test before. You may only take this test once.
Test is loading...
You must sign in or sign up to start this test.
You have to finish the following test before you may take this test:
0 of 40 questions answered correctly
Time has elapsed
You scored 0 of 0 points, (0)
- Air Brake, CDL, Rules of the Road 0%
- Combination Vehicles, CDL, Rules of the Road 0%
- Double Triple Trailers, CDL, Rules of the Road 0%
- General, CDL, Rules of the Road 0%
- Hazardous Material, CDL, Rules of the Road 0%
- Passenger Vehicle, CDL, Rules of the Road 0%
- Pre-Trip Inspection, CDL, Rules of the Road 0%
- School Bus, CDL, Rules of the Road 0%
- Tanker Vehicles, CDL, Rules of the Road 0%
Congratulations! You PASSED the CDL test! You can try it again to brush up on new questions or head down to your local DMV and take the state-administered test!
Ouch! You need to score at least 85% to pass this CDL test–that’s 34 correct questions out of 40. Why don’t you try it again and brush up on some of the questions before taking the real thing. If you need to focus on a specific category, try one of our CDL Category Tests by using the links below.
Air Brakes Combination Vehicles Double & Triple Trailers General Knowledge Hazardous Materials Passenger Vehicles Pre-Trip Inspections School Bus Tanker Vehicles
iowa Drivers Test
iowa Motorcycle Test
iowa CDL Test
CDL Category Practice Tests
CDL General Knowledge Test
Combination Vehicles Test
Passenger Vehicles Test
Pre-Trip Inspections Test
Double/Triple Trailers Test
CDL School Bus Test
CDL Air Brakes Test
Hazardous Materials Test
CDL Tanker Vehicles Test
CDL Practice Test
How To Get An iowa Commercial Drivers License
Individuals may apply for their CDL starting at age 18. To be eligible for interstate driving as well as HazMat and Doubles/Triples applicants must be 21 years of age or older. All individuals applying for an Iown CDL must present a Medical Examiner’s Certificate according to the United States Federal Regulations.
If any one of the descriptions below is true about an applicant, they will be disqualified from receiving their CDL.
- Driver posses more than one driver’s license.
- Driver was convicted of driving under the influence in the past 24 months.
- Driver has a suspended, denied, canceled, or revoked driver’s license.
H – Hazardous Materials
N – Tank Vehicle
T – Doubles/Triples
X – Hazmat and Tank Comb
P – Passenger Vehicle
S – School Bus
Drivers must take a knowledge test as well as a practical skills test to showcase their knowledge of commercial driving laws and their ability to operate a commercial vehicle.
Hit the Open Road
iowa CDL License Test Tips
Applicants must complete a general knowledge test to display their understanding of commercial driving laws. The general knowledge exam is comprised of 50 questions. Those seeking a Class A CDL will need to complete an additional 20 question test on combination vehicles. Applicants seeking additional endorsements will need to take an additional test on the endorsement topic. The Passenger, Tank, and Doubles/Triples Endorsements are 20 question tests. Removing the Air Brake Restriction, the Iowa Operator and School Bus Endorsements are 25 questions. The Hazmat Endorsement is a 30 question test. All applicants must pass the respective assessments with a score of 80 percent or better to receive their Iowa CDL permit.
A skills assessment is required of all applicants. This assessment is comprised of three parts, which are the pre-trip inspection, basic controls skills, and on-road driving. Individuals applying for their P and S endorsements will be required to take the skills test in the respective vehicle for their endorsement.
Information on the Iowa Department of Transportation
The Iowa Department of Transportation administers CDL requirements and testing in Iowa. To get more information contact them via:
Additional Iowa CDL Helpful Links
Please use the links below to access more valuable Iowa CDL testing resources and to learn more about practice driving tests for the state of Iowa.
- Iowa Commercial Driver License Manual
- Iowa CDL Practice Test App
- Iowa DOT Locations
- Iowa Truck Driving Schools
- Iowa Drivers License Practice Test
- Iowa Motorcycle Test