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The CDL general knowledge test is required to be taken by all CDL applicants. The Connecticut 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 Connecticut 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 CT 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. You should NOT use the parking brakes if:
the brakes are cold.
the brakes are too dry.
the brakes are very hot.
All of the above.
2. If you do not have a cell phone or CB, the first thing you should do at an accident scene is to:
gather Information for the  accident report.
care for the injured.
clear the area.
protect the accident area.
3. What should you do to test your hydraulic brakes for leaks?
Hold the brake pedal down for five seconds, then pump it three times.
Pump the brake pedal five times, then apply pressure for three seconds.
Pump the brake pedal three times, then apply pressure for 9 seconds.
Pump the brake pedal three times, then apply pressure to the pedal and hold for five seconds.
4. To avoid a crash:
stopping is not always the best thing to do.
swerving is always the worst thing to do.
stopping is always the safest thing to do.
None of the above.
5. Most heavy-duty vehicles use:
pump-the-brake systems.
single air brake systems.
dual air brake systems.
triple air brake systems.
6. If your vehicle thumps or vibrates heavily, it may be a sign that:
the engine belt is loose.
you need to shift up.
the brakes have failed.
one of the tires has gone flat.
7. Rollovers happen when drivers:
stop too often.
turn too slowly.
turn too fast.
brake too hard.
8. Which of the following is considered a serious traffic violation?
Reckless driving
Excessive speeding (15 mph or more above the posted limit)
Following a vehicle too closely
All of the above
9. How can you tell if your vehicle is equipped with ABS?
Trailers will have yellow ABS malfunction lamps on the left side.
Look under the vehicle for the wheel speed sensor wires coming from the back of the brakes.
Look for yellow ABS malfunction lamps on the instrument panel.
All of the above.
10. Railroad crossings with steep approaches:
require drivers to increase their speed before crossing the tracks.
can cause your unit to hang up on the tracks.
require drivers to shift gears while crossing the tracks.
are the safest type of railroad crossing.
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CDL Knowledge Test CT

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