Knowledge Test Class B #2
Class B Driving Test | Missouri 2025 #2 Page 3 of 7
Train for FREE online with our Missouri class B license test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a MO CDL class B permit in 2025, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that CDL class B requirements may vary from state to state.
50
40
20
15 . If you must stop on the side of a one-way or divided highway, how far behind your vehicle should you place warning devices?
If you must stop on or by a one-way or divided highway, you must place a warning device 10 feet, 100 feet, and 200 feet to the rear of your vehicle.
16 . A seat belt is:
A seat belt is a driver's best defense in the event of an accident. You must wear a seat belt at all times when operating a CMV.
17 . How much water must be present for a vehicle to hydroplane?
Hydroplaning is an effect in which a vehicle's tires lose traction with the surface of the road and instead glide along a layer of water. There does not have to be much water on the road for this to occur.
18 . Rough acceleration:
When accelerating, speed up smoothly and gradually so the vehicle does not jerk. Rough acceleration can cause mechanical damage.
19 . Which of the following is not required emergency equipment?
All commercial motor vehicles are required to be equipped with the proper emergency equipment. This may include spare electrical fuses; three red reflective triangles, six fuses, or three liquid burning flares; and at least one properly charged and rated fire extinguisher. Optional equipment includes tire chains, tire changing equipment, a list of emergency phone numbers, and an accident reporting kit/packet.
20 . If driving a new vehicle, you should familiarize yourself with the controls:
When operating a new vehicle, you should familiarize yourself with its features and equipment before getting behind the wheel.
21 . When backing with a trailer:
When backing, you should pull forward to reposition your vehicle whenever needed. Drift should be corrected immediately by turning the steering wheel in the direction of the drift.
2025 Missouri | Frequently Asked Questions
A CDL Class A license in Missouri is defined as a commercial driver's license that allows the holder to operate any combination of vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 pounds or more, given that the Gross Vehicle Weight Rating (GVWR) of the vehicle(s) being towed is over 10,000 pounds.
A Class A Commercial Driver's License (CDL) in Missouri allows operation of any combination of vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 pounds or more, provided the Gross Vehicle Weight Rating (GVWR) of the vehicle(s) being towed exceeds 10,000 pounds. Examples include tractor-trailers, truck and trailer combinations, tank vehicles, livestock carriers, and flatbeds.
To obtain a Class A CDL in Missouri, you must be at least 18 years old (21 for interstate travel), possess a valid non-commercial driver's license, and pass a vision test. You also need to pass the written knowledge test and skills tests, which include a pre-trip vehicle inspection, a basic vehicle control test, and an on-road driving exam.
In Missouri, to qualify for a Class A Commercial Driver's License (CDL), you must be at least 18 years old. However, if you plan on driving across state lines or want to qualify to drive a vehicle carrying hazardous materials, you must be at least 21 years old.
While specific endorsements are not required to obtain a Class A CDL in Missouri, they can provide additional driving privileges. Endorsements include T for double/triple trailers, P for passenger vehicles, N for tank vehicles, H for hazardous materials, S for school bus, and X for a combination of tank vehicle and hazardous materials. Each endorsement requires passing additional tests.
The Class A CDL skills test in Missouri encompasses three parts: the Vehicle Inspection Test, the Basic Controls Test, and the Road Test. The Vehicle Inspection Test checks your ability to assess the safety of your vehicle. The Basic Controls Test evaluates your control over the vehicle. The Road Test examines your on-road driving skills.
Yes, there are limitations on Class A CDL license holders in Missouri. These could include restrictions related to corrective lenses, automatic transmission, no passengers, intrastate driving only, or no air brakes. Restrictions are based on the driver's abilities, the type of vehicle used during the driving test, and any medical conditions.
In Missouri, the written Class A CDL test is primarily administered in English. However, some locations may offer the test in Spanish. It's important to check with your local testing center for language options. Please note, even if the test is taken in another language, federal regulations require all CDL holders to read and speak English.
Yes, you can request accommodations for the Class A CDL written test in Missouri if you have a disability. The Missouri Department of Revenue is committed to making testing accessible. You should contact the department or your local testing center ahead of time to discuss your needs and arrange for appropriate accommodations.
Yes, you can retake the Class A CDL written test in Missouri if you don't pass on your first attempt. You must wait at least one day before retaking the test. However, if you fail the test four times, you have to wait a minimum of 30 days before your next attempt. Additional fees may also apply for each retest.