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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. You should downshift:
before starting up a hill.
before starting down a hill or entering a curve.
before exiting a curve.
None of the above.
2. When you use mirrors while driving on the road, you should:
focus on the mirrors for a long time.
check quickly.
never look back and forth between the mirrors and the road ahead.
only use one mirror.
3. How can you tell if your vehicle is equipped with anti-lock braking system (ABS)?
Trailers will have yellow ABS malfunction lamps on the left side.
Look for yellow ABS malfunction lamps on the instrument panel.
Look under the vehicle for the wheel speed sensor wires coming from the back of the brakes.
All of the above.
4. Wisconsin's Implied Consent Law states that drivers who operate a vehicle within the state:
can refuse to take a chemical test by exercising their implied consent rights.
are deemed to have diven their consent to a chemical test of blood, breath, or urine.
may refuse to field sobriety tests.
drivers under 21 cannot drive after drinking any alcohol.
5. Wheel rims that have had welding repairs:
should not be used.
are safe.
should be placed in the front.
None of the above.
6. If coolant has to be added to a system without a recovery tank, you should:
keep the engine running while adding coolant.
never use thick cloth to touch the radiator cap.
turn the radiator cap quickly to the first stop.
wait until the engine has cooled before adding coolant.
7. During a pre-trip inspection, you discover a power steering leak. You should:
report the problem and make arrangements to use another vehicle.
report the problem after your trip and try to stay on schedule.
report the problem and start your trip, driving slower than normal.
try to fix the problem while driving.
8. It is safer to drive over (rather than to avoid) which of the following?
Cardboard boxes
Plastic containers
Paper and cloth sacks
None of the above.
9. An empty truck requires _________ a full truck.
the same stopping distance as
This is irrelevant.
less stopping distance than
a greater stopping distance than
10. Vehicle inspections:
should not be done by the shipper.
are important because vehicle defects found during an inspection could save you problems later.
should only be done when a vehicle defect is found.
should be performed once a week.
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WI CDL Knowledge Test

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