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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. How should you brake if your vehicle loses ABS?
Stay off the Brake
Step on and off the brake pedal several times
Brake as you always have.
Pump the brake repeatedly
2. The best time to take a short break is:
when you start to feel drowsy.
before you feel you need it.
when you feel you can't go any further without one.
at regular intervals.
3. Which of the following is NOT a good rule for using turn signals?
Cancel your signal after you have turned.
Signal well before you turn.
Signal continuously until you have completed the turn.
Put your turn signal on after the turn.
4. The only way to stop a front-wheel skid is to:
supply more power to the drive wheels.
let the vehicle slow down.
All of the above.
5. Warnings on low bridges or underpasses:
are often posted, but sometimes they are not.
are always posted.
must be posted.
None of the above.
6. While crossing railroad tracks, you should:
stop, then look and listen for the train.
not shift gears.
shift down.
shift up.
7. After starting the engine, the ABS light stays on. This means:
the ABS oil level is not adequate.
the ABS is working properly.
the ABS is not working properly.
the ABS is in Neutral.
8. One way to prevent hydroplaning is to:
use the controlled braking method.
have less than 4/32 inch tread depth in every major groove on front tires.
make sure you have enough tread on your tires.
take curves at higher speeds.
9. The penalty for a first conviction for driving under the influence (DUI) is:
You will lose your CDL for 3 years, if DUI while transporting hazardous materials.
You will lose your CDL for 1 year, if DUI while driving your personal vehicle.
You will lose your CDL for 1 year, if DUI while driving a CMV.
All of the above.
10. How do you find out how many seconds of following distance you have?
Wait until the vehicle ahead of you passes a pavement marking or some other clear landmark, then use the stopwatch on your mobile phone to see how long it takes you to reach the same spot.
Pass a stationary object and count how many seconds it takes the vehicle ahead of you to reach the same spot.
Wait until the vehicle ahead of you passes a pavement marking, shadow or landmark. Then count off the seconds until you reach the same spot.
None of the above.
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CDL Knowledge Test IN

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