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The CDL general knowledge test is required to be taken by all CDL applicants. The Kentucky 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 Kentucky 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 KY 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 driving in heavy rain, your brakes will get wet. Water in the brakes can cause:
lack of braking power.
wheel lockups.
the brakes to apply unevenly.
All of the above.
2. The most important way to see the sides and rear of your vehicle is to:
check your mirrors regularly.
get out and walk around the vehicle.
look at your line of travel.
look out the window.
3. When you take a break in the middle of your trip, you should check:
tires, brakes, lights and cargo securement devices.
gauges for signs of trouble.
heater, defroster and windshield wiper blades.
missing exhaust pipes.
4. Which of these describes the proper braking technique when driving on a long and steep downgrade?
Release the brakes until your speed is 5 mph above your safe speed, then apply the brakes. When your speed has decreased to your safe speed, repeat the previous steps.
Apply the brakes. When your speed has been reduced to 5 mph below your safe speed, release the brakes. When your speed has increased to your safe speed, repeat the previous steps.
Apply the brakes until your speed has been reduced to 5 mph, then release the brakes. When your speed has increased to your safe speed, repeat the previous steps.
All of the above.
5. Serious traffic violations include:
erratic lane changes.
driving a CMV without obtaining a CDL.
excessive speeding.
All of the above.
6. When transporting a load, the cargo should be inspected:
by your supervisor.
only after driving.
after every break you take during your trip.
by a helper.
7. How can you tell if your vehicle is equipped with anti-lock braking system (ABS)?
Trailers will have yellow ABS malfunction lamps on the left side.
Look for yellow ABS malfunction lamps on the instrument panel.
Look under the vehicle for the wheel speed sensor wires coming from the back of the brakes.
All of the above.
8. The posted speed limit for a curve:
is safe for trucks or buses, but it may be too fast for cars.
may be too fast for many trucks or buses.
is safe for all vehicles.
is optional and may be exceeded.
9. If no qualified person is at the accident and an injured person is bleeding heavily, how can you give assistance?
Keep the injured person cold.
Look for a doctor.
Poor cold water on the wound.
Apply direct pressure to the wound.
10. When driving at night, to avoid glare from oncoming vehicles you should:
wear sunglasses.
look directly at lights of oncoming vehicles.
put your own high beams on when other drivers do not put their low beams on.
look slightly to the right at a right lane or edge marking.
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KY CDL Knowledge Test

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