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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. The most important reason you inspect your vehicle is:
because Federal and state laws require that drivers inspect their vehicles.
to avoid insurance premium hikes.
2. Emergency equipment is:
only required when transporting hazardous materials.
3. For fire safety, the correct list of items you should check during your pre-trip inspection is:
cargo, fuel, steering wheel, electrical system, fire extinguisher.
fuel and fire extinguisher.
cargo, fuel, electrical and exhaust systems.
tires, cargo, fuel, electrical and exhaust systems, fire extinguisher.
4. Air tanks usually hold enough compressed air to allow the brakes to be used _________ even if the compressor stops working.
several times
for 3 days
for one day
for one stop
5. _______ is the number one cause of death and injury in work zones.
Driving too slow for conditions
Excessive heat
Braking distance
6. The minimum tire tread depth for all tires other than front tires is:
6/32 inch
2/32 inch
4/32 inch
1/32 inch
7. An Anti-lock Braking System (ABS):
keeps your wheels from locking up when you brake hard.
lets you drive faster.
always shortens your stopping distance.
increases your normal braking capability.
8. Which of the following statements about accelerating is TRUE?
Rough acceleration can cause mechanical damage.
If the drive wheels begin to spin, speed up to regain traction.
When traction is poor, you should avoid speeding up gradually.
All of the above.
9. For safety during a trip, you should:
use your senses to check for problems.
check critical items when you stop.
watch gauges for signs of trouble.
All of the above.
10. If you are driving a vehicle with manual transmission that requires double clutching to change gears, the first step of the basic method for shifting up is to:
Pump the brakes and release the clutch.
Release the accelerator, push in the clutch and shift to neutral at the same time.
Push in the clutch and shift into a higher gear at the same time.
Release the clutch and press the accelerator at the same time.
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TN CDL Knowledge Test

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