Knowledge Test Class A
This license is required for driving any legal combination of vehicles, with a gross combination weight rating of 26,001 pounds or more, provided the GVWR of a trailer exceeds 10,000 pounds To receive this license, applicants must pass a 50-question test. To pass, applicants must answer 40 questions correctly. Each question has three possible answer choices. Test questions come from the Iowa Commercial Driver License Manual. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Combination, Doubles and Hazardous Materials. Endorsements that may be used with a Class A CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.
1. An application pressure gauge shows:
If a vehicle is equipped, an application pressure gauge shows how much air pressure is being applied to the brakes. This gauge can help a driver identify if their brakes are beginning to fade.
2. Skids caused by over-acceleration can usually be resolved by:
A skid caused by over-acceleration can be resolved simply by removing your foot from the accelerator. Skids of this nature happen most frequently on surfaces covered in snow or ice.
3. The only way to sober up after consuming alcohol is to:
Most alcohol is removed from the body by the liver, which processes alcohol at a fixed rate. Despite popular belief, techniques like drinking black coffee or taking a cold shower will not accelerate this process. The only thing you can do to become sober after drinking is allow your body the time it needs to eliminate the alcohol from your system.
4. When driving at night, you should do all of the following, except:
To ensure that you can see as well as possible, don't wear sunglasses when driving at night. If you wear eyeglasses, make sure they are clean and unscratched. Make sure you are rested and alert before driving at night.
5. During a pre-trip inspection, belts should be:
When inspecting your vehicle, you should check all belts for tightness and excessive wear. You should learn how much "give" is appropriate for each belt.
6. In cool weather, as the temperature begins to rise and ice begins to melt:
As the temperature begins to rise and ice on the road begins to melt, the road surface will often become even more slippery. Water from the slight melting will sit on top of the ice, decreasing the available traction even more. Always decrease your speed and drive with caution when traveling on slippery surfaces.
7. You must have an air brake endorsement:
You must take an air brakes knowledge test to become licensed to operate a vehicle that is equipped with air brakes, including an air over hydraulic braking system.
Frequently Asked Questions
1. Combination of vehicles with a gross combination weight rating (GCWR) of 26,001 pounds or more, provided that the towed vehicle weighs over 10,000 pounds
3. Truck and trailer combinations
4. Livestock carriers
6. Tanker vehicles
7. Refrigerated trucks (reefers)
8. Double and triple trailers
It's important to note that you must have the appropriate endorsements on your license to operate certain types of vehicles, such as hazardous materials or passenger transport vehicles.
1. Be at least 18 years of age (21 years of age for interstate travel)
2. Hold a valid Iowa driver's license
3. Provide a valid Social Security Number
4. Pass a medical examination and obtain a medical certificate
5. Submit a completed Commercial Driver License Application
6. Pass a written knowledge test (general knowledge, air brakes, and combination vehicle)
7. Pass a skills test (pre-trip inspection, basic vehicle control, and on-road driving)
8. Pay the required fees
It's important to note that additional requirements may apply depending on the type of vehicle you wish to operate and any endorsements you may need for certain types of cargo or passengers.
1. T - Double/Triple Trailers Endorsement: Required to operate vehicles pulling two or three trailers.
2. P - Passenger Endorsement: Required to operate vehicles designed to transport 16 or more passengers, including the driver.
3. N - Tank Vehicle Endorsement: Required to operate any vehicle that is designed to transport any liquid or gaseous material within a tank or tanks having an individual rated capacity of more than 119 gallons.
4. H - Hazardous Materials Endorsement: Required to transport hazardous materials as defined by federal law.
To obtain an endorsement, you will need to pass additional knowledge and skills tests related to the specific type of vehicle and cargo that you will be transporting.
1. Pre-Trip Inspection: You will be asked to perform a pre-trip inspection of your vehicle to ensure that it is safe to operate. You will need to identify and explain the function of various components of the vehicle, such as brakes, tires, lights, and coupling devices.
2. Basic Vehicle Control: You will need to demonstrate your ability to control the vehicle in various situations, such as backing up, turning, and maneuvering through tight spaces.
3. On-Road Driving: You will need to demonstrate your ability to safely operate the vehicle on public roads. The examiner will evaluate your ability to follow traffic laws, use proper technique when shifting gears and braking, and respond appropriately to various driving situations.
You must pass all three parts of the skills test in order to obtain your Class A CDL license. It is important to practice and prepare for the test beforehand by studying the Iowa Commercial Driver License Manual and getting as much hands-on training as possible.
1. Endorsement Restrictions: As we discussed earlier, you may need additional endorsements to operate certain types of vehicles or transport certain types of cargo. If you do not have the required endorsement, you will be restricted from operating that type of vehicle or cargo.
2. Air Brake Restriction: If you did not pass the air brakes knowledge test or the air brakes skills test, you will be restricted from operating any vehicle with air brakes.
3. Automatic Transmission Restriction: If you took the skills test in a vehicle with an automatic transmission, you will be restricted from operating any vehicle with a manual transmission.
4. Intrastate Restriction: If you only plan to operate your Class A CDL vehicle within the state of Iowa, you will be restricted from operating in other states.
It is important to understand and comply with any restrictions or limitations on your Class A CDL license to avoid potential violations and penalties.
However, if you require language assistance, you may bring an interpreter with you to help translate the questions and instructions on the test. The interpreter must be fluent in both English and your preferred language, and they must not be a family member or friend.
Additionally, if you have a medical condition that affects your ability to read or understand English, you may be eligible for a waiver of the English language proficiency requirement. You will need to provide documentation of your medical condition and request a waiver from the Iowa Department of Transportation.
To request accommodations, you will need to fill out and submit the Iowa DOT’s Request for Reasonable Accommodations form. You will need to provide documentation of your disability and describe the specific accommodations you need in order to take the test.
Examples of accommodations that may be provided include extra time to complete the test, a separate testing room, assistive technology, or a sign language interpreter.
It is important to note that you must submit your request for accommodations at least 30 days before your scheduled test date. This will allow the Iowa DOT enough time to review your request and make arrangements for your accommodations.
If you fail the written test, you must wait at least one day before you can retake it. If you fail the test three times, you must wait at least 14 days before taking it again. If you fail the test six times, you must wait at least 30 days before taking it again.
It is important to note that each time you retake the test, you will need to pay the testing fee again. The fee for the Class A CDL written test in Iowa is $11.
If you continue to have difficulty passing the written test after multiple attempts, it may be helpful to consider getting additional study materials or enrolling in a CDL training program to improve your knowledge and increase your chances of passing.