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The CDL general knowledge test is required to be taken by all CDL applicants. The Washington CDL test consists of 50 questions. To pass, you must correctly answer at least 40 questions (80%). The general knowledge test covers the contents of the Washington CDL Manual. All CDL applicants (Class A, B and C) must study the following sections: Driving Safely, Transporting Cargo Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Vehicle Inspection Test, Basic Control Skills Test, Road Test. In addition, the Class A CDL test will include questions based on the Combination Vehicles section. Take this CDL practice test now to prepare for the actual WA general knowledge test! To get your CDL, you must pass both the knowledge and skills tests. CDL knowledge tests include: General Knowledge, Passenger Transport, Air Brakes, Combination Vehicles, Hazardous Materials, Tanker Vehicles, Doubles/Triples, School Bus, Firefighter. Depending on what class of license (A, B or C) and endorsements you need, you must take one or more knowledge tests. A special endorsement is also required to drive certain types of vehicles. The following endorsements may be used with a Class A, B or C CDL: HazMat (H), Tank Vehicles (N), Tank Vehicles Transporting Hazardous Materials (X) and Passenger Transport (P). The School Bus endorsement (S) is only available for Class A or B CDL, and the Doubles/Triples endorsement (T) is only available for Class A driver's licenses.
1. When you drive a tractor-trailer combination with ABS, you should:
apply the trailer hand brake whe braking.
brake as you always have.
pump the brakes.
2. An antilock braking system (ABS):
in order to work, requires you to apply the brakes as hard as you can.
requires a change in the way you brake.
None of the above:
3. When loading cargo, keep the load:
to the front.
balanced in the cargo area.
to the rear.
4. To obtain the HazMat endorsement, a person must be:
a former qualified military service member.
under indictment for certain felonies.
a U.S. citizen.
5. Which of the following should you check for looseness, damage, sticking or improper settings?
Steering wheel
Transmission controls
All of the above.
6. When inspecting your vehicle, before checking the engine compartment be sure that:
the fire extinguisher is properly charged and rated.
the parking brakes are on and/or wheels chocked.
all lights are working.
7. When approaching a vehicle as part of a pre-trip inspection, the driver should look under the vehicle for all of the following except:
Windshield wiper fluid
8. The distance you will continue to travel, in ideal conditions, before you physically hit the brakes in response to a hazard ahead is called:
Reaction distance
Perception distance
Braking distance
9. What is Gross Vehicle Weight Rating?
The value specified by the manufacturer as the loaded weight of a single vehicle
The total weight of a combination of vehicles including the load
The total weight of a single vehicle, including its load
10. The first thing to do at an accident scene is to:
notify authorities.
keep another accident from happening.
care for the injured.
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CDL Knowledge Test WA

Number of questions: 50
Correct answers to pass:40
Passing score:80%
Number of questions: 50
Correct answers to pass:40
Passing score:80%
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