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The CDL general knowledge test is required to be taken by all CDL applicants. The Vermont 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 Vermont 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 VT 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. ABS malfunction lamps are located:
on the instrument panel.
under the hood.
on the driver'door.
2. Effects of distracted driving include:
slowed perception.
failure to perceive an important traffic event.
All of the above.
3. Serious traffic violations include:
erratic lane changes.
driving a CMV without obtaining a CDL.
All of the above.
4. Excessive use of the service brakes results in overheating. Too much heat can:
cause the brakes apply unevenly.
cause the brakes to grab.
make the brakes stop working.
5. Suspension systems:
have a minimum weight rating.
have a weight capacity rating.
are rated for the maximum weight the vehicle can pull.
6. Which of the following is a key steering system part?
Tie rod
Anchor plate
Leaf spring
7. When a tire fails, the driver should:
immediately apply the brakes.
stay off the brake.
swerve to the right.
8. To know when it's time to shift up:
use engine speed and road speed.
watch your tachometer, and shift up when your engine reaches the bottom of the range.
use mirrors on both sides.
9. Escape ramps:
have been built to stop runaway vehicles on steep downgrades.
can only be used by trucks or passenger vehicles.
are used to safely leave the highway.
10. The Gross Vehicle Weight Rating (GVWR) is:
the value specified by the manufacturer as the loaded weight of a single vehicle.
the value specified by the manufacturer as the loaded weight of a vehicle, including cargo and trailers.
the value specified by the manufacturer as the loaded weight of a combination vehicle.
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VT CDL Practice Test

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