Knowledge Test Class B #1
Class B Driving Test | Washington 2026 #1 Page 6 of 7
Train for FREE online with our Washington 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 WA CDL class B permit in 2026, 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.
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36 . Which of the following is not a cause of hydraulic brake failure?
Most cases of hydraulic brake failure come from one of two causes. The brakes may fail due to a loss of hydraulic pressure or due to overuse on long hills, causing the brakes to fade.
37 . When inspecting the windshield before a trip, a person should do all the following, except:
When inspecting your windshield, you should look for cracks or other problems that could interfere with your ability to clearly see the road. The windshield wiper arms should be checked for proper spring tension. The wiper blades should be checked for damage, stiff rubber, and improper securement.
38 . One way to prevent drowsiness while driving is to:
Driving while fatigued can be extremely dangerous. Strategies for preventing drowsiness while driving include getting a full night's sleep before a trip; having someone ride with you; scheduling trips for times during which you are normally awake; and avoiding medications that may cause drowsiness. Exercising regularly can increase your energy levels and make you less likely to become tired while driving.
39 . To qualify for a CDL, which of the following is not an acceptable method for obtaining the minimum required training?
If you are applying for your first CDL, or you have not been commercially licensed for the past year, you must provide proof of completing a commercial driver training program from a state-approved training school or registered employer.
40 . How many daily hours of sleep does an adult need to maintain alertness?
Being properly rested is essential to the safe operation of a CMV. To maintain alertness, most people need eight to nine hours of sleep per night.
41 . Poor weight balance:
Poorly balanced cargo can cause a vehicle to be difficult to handle. Keep weight distribution in mind when loading cargo.
42 . If involved in an accident, a truck operator should:
If involved in a collision, you must stop immediately to tend to the injured and exchange information with all others involved. File a report with law enforcement within four days of any collision resulting in injuries or more than $1,000 in damage.
2026 Washington | Frequently Asked Questions
A CDL Class B license in Washington allows the holder to operate single vehicles with a Gross Vehicle Weight Rating (GVWR) of 26,001 or more pounds, or any such vehicle towing another not exceeding 10,000 pounds. This typically includes buses, dump trucks, tow trucks, delivery trucks, and straight trucks.
A Class B CDL license allows you to operate single vehicles with a gross vehicle weight rating (GVWR) of 26,001 pounds or more, or a vehicle of this size towing another not exceeding 10,000 pounds. You can drive buses, dump trucks, tow trucks, delivery trucks, garbage trucks, and straight trucks with this license.
To acquire a Class B CDL license in Washington, applicants must be at least 18 years old (21 if intending to drive interstate), possess a valid Washington state driver's license, pass a vision test, and successfully complete both a knowledge test and skills test. They also must provide proof of U.S. citizenship or lawful permanent residency.
In Washington, you must be at least 18 years old to qualify for a Class B CDL license. However, please note that you must be 21 years old or older if you intend to drive commercial vehicles across state lines (interstate driving).
Specific endorsements aren't necessary for a Class B CDL license, but they can broaden your driving opportunities. Endorsements like H (Hazardous Materials), N (Tank Vehicles), P (Passenger Transport), and S (School Bus) require additional knowledge tests. The T endorsement for double/triple trailers isn't applicable to Class B.
The Class B CDL skills assessment in Washington includes three parts: pre-trip inspection, basic vehicle control, and on-road driving. You'll need to demonstrate knowledge of your vehicle's components, show you can control your vehicle in various situations, and prove you can safely drive in normal traffic conditions.
Yes, Class B CDL license holders in Washington are limited to driving vehicles under 26,001 pounds or towing vehicles that do not exceed 10,000 pounds. They can't operate Class A vehicles unless they upgrade their license. Also, they can't drive vehicles requiring special endorsements unless they pass additional tests.
Yes, in Washington, the written Class B CDL test is available in multiple languages. However, federal regulations require all commercial drivers to read and speak English well enough to converse with the general public, understand traffic signs and signals, respond to official inquiries, and make entries on reports and records.
Yes, in Washington, if you have a disability that requires special accommodations for the Class B CDL written exam, you can request them. Accommodations may include Braille or large print exams, oral exams, or extra time. Be sure to make your request well in advance to allow for arrangements.
Yes, if you don't pass the Class B CDL written test in Washington, you can retake it. However, you must wait at least three days before attempting the test again. You'll need to pay a retesting fee each time. Remember to study thoroughly before retaking to increase your chances of passing.