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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. For fire safety, the correct list of items you should check during your pre-trip inspection is:
cargo, fuel, electrical and exhaust systems.
cargo, fuel, steering wheel, electrical system, fire extinguisher.
tires, cargo, fuel, electrical and exhaust systems, fire extinguisher.
fuel and fire extinguisher.
2. To stay alert and safe while driving, you should:
drink coffee if you get drowsy.
always drive alone, if possible.
avoid any drug that hides fatigue.
drive at night, if possible.
3. Service brakes should:
be checked before each trip.
only be checked by a mechanic.
always be checked before applying the brakes.
All of the above.
4. When driving in construction areas you should:
reduce speed to a crawl.
stop driving as soon as you can safely do so.
decrease your speed.
increase your speed.
5. An item that is 15 feet long placed on a flatbed trailer should have at least:
2 tie-downs.
1 tie-down.
15 tie-downs.
3 tie-downs.
6. Emergency lines are often coded with the color ___ to keep from getting them mixed up with the service line.
7. If an aggressive driver confronts you, you should NOT:
try to let them pass.
make eye contact.
try to get out of their way.
ignore gestures.
8. Use of drugs can lead to traffic accidents resulting in:
Property damage
All of the above.
9. Which of the following statements about retarders is NOT correct?
You should turn the retarder off whenever the road is wet, icy, or snow covered.
Retarders help you avoid skids.
Retarders help slow a vehicle, reducing the need for using brakes.
Retarders reduce reduce brake wear.
10. The air compressor governor:
allows the compressor to start pumping air when the tank pressure rises to the "cut-out" pressure.
stops the compressor from pumping air.
controls when the air storage tanks will pump air into the air compressor.
All of the above.
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Number of questions: 50
Correct answers to pass:40
Passing score:80%
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