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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 should you turn the retarder off?
when the cargo is heavy.
when your vehicle has a high center of gravity.
when the road is slippery.
2. A driver waiting for too long at a stop could be a sign of:
an impaired driver.
a blind driver.
a disabled driver.
3. Rust around wheel nuts may mean:
the wheels or rims have had welding repairs.
the nuts are loose.
the nuts are too tight.
4. If a tire blows out, you should:
fully apply the brakes while holding the steering wheel firmly.
keep a firm grip on the steering wheel and stay off the brake until the vehicle has slowed down.
keep driving until you reach the next service station.
5. For safety during a trip, you should:
watch gauges for signs of trouble.
check critical items when you stop.
All of the above.
6. Class 1 hazardous materials include:
Flammable liquids
Flammable solids
7. Which of these is NOT part of the basic method for shifting up?
Accelerate while pressing the clutch and turn toward the driver's side.
Release the accelerator, push in the clutch and shift to neutral at the same time.
Push in the clutch and shift to the higher gear at the same time.
8. Most heavy duty vehicles use ___ air brake systems for safety.
9. Before entering a curve, drivers should:
downshift to the right gear.
speed up.
drive on the shoulder.
10. When making a left turn at an intersection, you should:
reach the center of the intersection before you start the left turn.
always use your horn.
always take the left turn lane if there are two turning lanes.
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WA CDL Knowledge Test

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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