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The CDL general knowledge test is required to be taken by all CDL applicants. The Idaho 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 Idaho 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 ID 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. Your mirrors should be adjusted so that:
the rear of the vehicle is visible in the mirror.
a part of the vehicle is visible in the mirror.
no part of the vehicle is visible in the mirror.
2. Which of the following is not proper tie-down equipment:
Bungee cords
3. Texting while operating a commercial motor vehicle is:
acceptable if you are contacting your supervisor.
acceptable if you are contacting your dispacther.
4. After starting the engine, the ABS light stays on. This means:
the ABS is working properly.
the ABS is in Neutral.
the ABS is not working properly.
5. You should signal your intention to turn at least ____ before turning or changing lanes.
50 feet
100 feet
250 feet
6. Backing is dangerous because:
you cannot see everything behind your vehicle.
cargo may fall out.
you have to turn the steering wheel toward the direction you want to go.
7. You should use your four-way emergency flashers:
when parked at the side of the road.
while crossing railroad tracks.
when driving at night.
8. Why should you complete an after-trip inspection report?
To help the motor carrier know when the vehicle needs repairs.
To prove that you finished your trip.
So you won't be held responsible for any subsequent damage.
9. Which of the following does alcohol impair?
Muscle coordination
Depth perception
All of the above.
10. When going down a hill, you should downshift:
after starting down a hill.
as you go downhill.
before you start going downhill.
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ID CDL Practice Test

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