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The CDL general knowledge test is required to be taken by all CDL applicants. The Wisconsin 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 Wisconsin 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 WI 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. What is a "header board"?
Another term for the brake camshaft.
The pressure gauge connected to the air tank.
A safety device that protects you from your cargo in case of an accident.
The back door of the cargo compartment.
2. Your total stopping distance consists of __________ plus reaction distance plus braking distance.
partial stopping distance
perception distance
following distance
passing distance
3. Under-loaded front axles can:
cause the drive wheels to spin easily.
make the steering axle weight too light to steer safely.
cause poor traction.
All of the above.
4. Which of these is NOT something you should check during the pre-trip inspection of the engine compartment?
Engine oil level
Coolant level in radiator
Brake controls
Worn electrical wiring insulation
5. What is a pull up when referring to truck driving?
A specific maneuver used to decelerate smoothly in the exit lane.
Using the speedometer to know when to shift up.
A driving maneuver used to pull your vehicle over to the side of the road and stop.
When a driver stops and pulls forward to get a better position.
6. If the vehicle ahead of you is smaller than yours:
it can probably stop faster than you can.
it will usually take longer to stop.
it will take the same amount of time to stop.
All of the above.
7. To release the parking brakes:
pump the brake pedal 3 times.
pull the parking brake control knob out.
place the parking brake control knob in Neutral.
push the parking brake control knob in.
8. Your vehicle has hydraulic brakes. When you press the brake pedal while driving and the pedal goes to the floor, remember that:
pumping the brake pedal may generate enough hydraulic pressure to stop the vehicle.
the parking brake should never used to slow the vehicle.
shifting into neutral may help slow the vehicle.
All of the above.
9. When backing a trailer, you should:
never make pull-ups to reposition your vehicle.
turn the steering wheel in the direction you want to go.
try to position your vehicle so you can back in a straight line.
avoid correcting the drift.
10. When going down a steep downgrade, it is important to select a "safe" speed that is not too fast for:
the weather.
the total weight of the vehicle and cargo.
the steepness of the grade.
All of the above.
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WI CDL Practice Test

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