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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. To check the automatic transmission fluid:
you must go down grades.
the wheel nuts must be loose.
you should turn the engine off.
the engine may have to be running.
2. Fully loaded trucks require greater stopping distances than empty vehicles. True or False?
True, but only if the truck was built after 1998.
True, but only on wet surfaces.
3. What is the minimum tread depth for front tires?
4/32 inch
1/2 inch
1/32 inch
3/8 inch
4. When going down long, steep downgrades, you should:
downshifting and then use the brakes.
rely solely on engine braking to reduce your speed.
try not to use the brakes.
only use the brakes.
5. Railroad crossings with steep approaches:
require drivers to shift gears while crossing the tracks.
require drivers to increase their speed before crossing the tracks.
are the safest type of railroad crossing.
can cause your unit to hang up on the tracks.
6. The application pressure gauge:
shows how much air pressure is being applied to the brakes.
stops the compressor from pumping air.
tells you how much pressure is in the air tanks.
protects the tank and the rest of the system from too much pressure.
7. Which of the following should be checked for looseness, sticking, damage, or improper setting?
Steering wheel
All of the above.
8. When looking ahead of your vehicle while you are driving, you should:
shift your attention back and forth, near and far.
look to the left side of the road.
look to the right side of the road.
look as far as your peripheral vision can see.
9. When you are driving on a slippery road, you should NOT:
adjust turning and braking to road conditions.
keep a longer following distance.
use the engine brake or speed retarder.
take curves at slower speeds.
10. When only the tractor has ABS:
there is a greater chance of jackknifing.
the ABS won't work.
the trailer is less likely to swing out.
you should be able to maintain steering control during 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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