Knowledge Test Class B #1
Class B Driving Test | Washington 2026 #1 Page 7 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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43 . On a slippery road, a driver should:
Under slippery conditions, you should drive slowly and smoothly. Make turns as gently as possible and do not pass other vehicles unless you have to.
44 . A low air pressure warning signal should activate:
In an air brake system, a low air pressure warning signal must come on if air pressure in the tanks falls below 60 psi. This warning signal may come in the form of a light, a buzzer, or a wig wag.
45 . If an aggressive driver is involved in a crash down the road, you should:
If you observe a crash involving an aggressive driver, you should stop a safe distance from the crash scene, wait for police to arrive, and inform them of the aggressive behavior you witnessed.
46 . What is the maximum legal weight to be placed on a single axle?
The allowable gross weight of a bus or truck depends on its tire size, the number of axles, and the spacing of axles (or axle groups). In Washington State, the weight of a commercial vehicle is limited to no more than 20,000 pounds on any single axle.
47 . Do not base your decision to shift gears on:
One way to know when it is time to shift gears is to learn your vehicle's operating rpm range. You should shift up when your engine reaches the top of that range. You can also learn which speeds each gear is good for and shift up based on your speedometer.
48 . If a vehicle's Anti-Lock Braking System (ABS) is malfunctioning:
An Anti-Lock Braking System (ABS) intervenes to reduce brake pressure if there is a risk of wheel lockup. If the ABS isn't working, the vehicle's basic braking functions are not affected. A driver should continue to drive and brake in a normal manner.
49 . In a vehicle with dual parking control valves, a separate air tank can be used:
In a vehicle with dual parking control valves, there is a separate air tank that can be used to temporarily release the spring brakes if they have been activated due to low air pressure. Pushing in the proper control will release the spring brakes for a short period of time, allowing the driver to move the vehicle in an emergency.
50 . Blocking is used to:
Blocking may be used on all sides of a piece of cargo to keep it from sliding while the vehicle is in motion.
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.