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The CDL general knowledge test is required to be taken by all CDL applicants. The Tennessee 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 Tennessee 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 TN 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. When you are driving very slowly you should:
stay in the left lane.
avoid braking.
use the 4-way emergency flashers.
not use any lights.
2. In cool weather, as the temperature rises to the point where ice begins to melt:
traction will increase.
it is safe to drive.
black will makes the road look wet.
the road will become more slippery.
3. If a vehicle is equipped with ABS, when you start the engine:
the trailer emergency brakes will come on.
the wheels will lock up.
the spring brakes will come on.
the ABS indicator light on the dash should come on and then turn off.
4. If driving a heavy vehicle, you should:
avoid braking.
stay in the right lane.
stay in the left lane.
try to pass other vehicles going uphill.
5. When the temperature drops, which of the following surfaces will become icy first?
6. Engine oil pressure should come up to normal within _________ after the engine is started.
two minutes
five minutes
ten minutes
7. You should not use your horn unnecessarily. Why?
The horn on a vehicle wears out very quickly
On vehicles possessing air brakes, it uses up air pressure you may need to be able to stop
The horn can startle other drivers, which could be dangerous.
All of the above.
8. When switching gears, if you remain too long in Neutral:
you may have difficulty putting the vehicle into the next gear.
the vehicle will speed up.
the brakes won't work.
the ABS won't work.
9. How should you brake if your vehicle loses ABS?
Step on and off the brake pedal several times
Pump the brake repeatedly
Stay off the Brake
Brake as you always have.
10. When driving, you should be alert for:
sleepy drivers late at night.
people who are distracted.
drivers whose vision is blocked.
All of the above.
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TN CDL Practice Test

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