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The CDL general knowledge test is required to be taken by all CDL applicants. The Indiana 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 Indiana 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 IN 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 crossing or entering traffic with a heavy vehicle:
you can count on other drivers to move out of your way so you can safely enter the flow of traffic.
you should allow more room if your vehicle is not loaded.
you may need a much larger gap to enter traffic than you would in a car.
None of the above.
2. What should you do when confronted by an aggressive driver?
Challenge them by speeding up
Ignore gestures
Hold-your-own in your travel lane
Make eye contact
3. Commercial motor vehicles:
are not required to have a fire extinguisher if they already have reflective warning triangles and other emergency equipment.
are only required to have a fire extinguisher when transporting hazardous materials.
should have a properly charged and rated fire extinguisher and other emergency equipment.
None of the above.
4. During the after-trip inspection, if you notice anything affecting safety or potentially leading to a mechanical breakdown, you should:
make a written report.
ask the motor carrier to make a written report.
tell the shipper to make a written report.
try to fix the problem yourself.
5. Which of the following will help a drinker sober up?
Drinking coffee
Fresh air
All of the above.
6. Which of the following are possible causes of tire fires?
Over-inflated tires and short circuits.
Improperly loaded cargo and dual tires that touch.
Under-inflated tires and dual tires that touch.
Loose fuel connections or under-inflated tires.
7. When driving in fog, drivers should:
use high beams.
use windshield washer antifreeze.
use low beams.
use the windshield wipers.
8. On dry pavement, the braking distance when traveling at 55 mph is about:
216 feet.
419 feet.
61 feet.
142 feet.
9. The most important hand signal you should agree on with a helper is:
Keep backing
10. If you need to make a large steering adjustment while using controlled braking, you should:
keep braking as hard as you can while steering.
pump the brakes and keep the wheels locked up.
release the brakes.
downshift and keep braking.
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IN CDL Knowledge Test

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