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The CDL general knowledge test is required to be taken by all CDL applicants. The Colorado 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 Colorado 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 CO 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. The steering wheel should:
be held firmly with the left hand.
be held with one hand at a time.
be held firmly with both hands.
be held firmly with the right hand.
2. If you feel drowsy, you should _______ before driving.
drink coffee
listen to upbeat music
3. To avoid a crash:
swerving is always the worst thing to do.
stopping is not always the best thing to do.
stopping is always the safest thing to do.
None of the above.
4. If your vehicle is hydroplaning, you should:
apply the brakes.
stay off the brake.
speed up.
put the vehicle in reverse.
5. An antilock braking system (ABS):
decreases your stopping distance.
requires a change in the way you brake.
in order to work, requires you to apply the brakes as hard as you can.
None of the above:
6. Which of the following is a key steering system part?
Tie rod
Leaf spring
Anchor plate
7. When faced with an emergency, drivers should:
immediately drive to the nearest police station.
make a U-turn and go in the opposite direction.
drive away as quickly as possible.
come to a stop if it is safe to do so.
8. Driving at night is _______ driving during the day.
about the same as
safer than
more dangerous than
None of the above.
9. A vehicle inspection should be done in the same order each time:
because the report must be written in that order.
because it is required by law.
so you are less likely to forget something.
because it's much quicker.
10. If you must make a quick stop to avoid an accident, you should:
jam on the brakes to keep your vehicle in a straight line.
increase your stopping distance.
use controlled or stab braking.
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CDL Knowledge Test CO

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