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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 you get in the vehicle and start the engine, you should:
make sure the parking brake is on before starting the engine.
listen for unusual noises after starting the engine.
put the gearshift in neutral (or park if automatic) before starting the engine.
All of the above.
2. Stab braking cannot be used in vehicles with:
anti-lock brakes.
air brakes.
parking brakes.
spring brakes.
3. If your vehicle catches fire while you are driving, you should:
pull into a service station.
immediately open the van or trailer doors.
increase your speed to put out the fire.
park in an open area.
4. The Individual Vehicle Distance Record (IVDR) must include all of the following except:
Trip origin and destination
Number of stops
Date of trip
Total distance traveled
5. Weaving across the road or drifting from one side to another is typical of:
slow drivers.
confused drivers.
impaired drivers.
6. You should always be looking for hazards to have time to plan a way out of any emergency. This is part of being a:
reasonable driver.
good enough driver.
defensive driver.
modular driver.
7. When inspecting a vehicle's suspension, you should look for broken or missing leaves in the leaf springs.  If ____ or more are missing, it will put the vehicle out of service.
8. When using a fire extinguisher on a fire, you should:
aim the extinguisher at the top of the fire.
get as close to the fire as possible.
stay as far away from the fire as possible.
All of the above.
9. How do you test hydraulic brakes for leaks?
Pump the brake pedal three times, then apply firm pressure to the pedal and hold for five seconds. The pedal should not move.
Pump the brake pedal ten times and see if it holds.
Pull forward against parking brake to make sure the hydraulic brakes holds.
None of the above.
10. If you doubt you have enough space to pass under a bridge, you should:
drive faster.
turn on your headlights.
go slowly.
turn on your 4-way emergency flashers.
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IN CDL Practice Test

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