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The CDL general knowledge test is required to be taken by all CDL applicants. The Florida 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 Florida 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 FL 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 height of a vehicle's center of gravity is important for safe handling. Why?
A high center of gravity means you are less likely to tip over.
Trucks with a high center of gravity can roll over at the posted speed limit for a curve.
Trucks with a high center of gravity have better traction.
All of the above.
2. When you leave your vehicle you should:
release the parking brake.
leave the key in the ignition.
apply the service brake.
None of the above.
3. Hydroplaning:
only occurs at extremely high speeds.
never occurs at speeds below 40 mph.
can occur at speeds as low as 30 mph.
only happens when tire pressure is higher than normal.
4. Which of the following is not part of the air brake system?
Alcohol evaporator
Air filter
Air storage tanks
Air compressor
5. The average driver has a reaction time of:
1/8 of a second.
1/32 of a second.
3/4 second to 1 second.
1/16 of a second.
6. To reduce driver distraction, you should do all of the following except:
Adjust mirrors before driving
Plan your route before driving
Pre-program radio stations
Eat while driving.
7. When you are driving you should look at least ______ ahead.
12 to 15 seconds
20 to 30 seconds
6 to 12 seconds
5 to 10 seconds
8. To prevent drowsiness before a trip, you should:
drive with a passenger.
consult your physician if you suffer from daytime sleepiness.
schedule trips for the hours you are normally awake.
All of the above.
9. If you smell exhaust fumes in the cab, you should:
remember to conduct a post-trip inspection.
open the windows.
stop immediately.
wait for the next stop, then inspect your vehicle.
10. Weight that is loaded so there is a high center of gravity:
makes a vehicle easier to handle.
causes greater chance of rollover.
reduces the chance that the load will shift to the side or fall off.
All of the above.
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CDL Knowledge Test FL

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