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The CDL general knowledge test is required to be taken by all CDL applicants. The Maine 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 Maine 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 ME 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 backing a trailer, turn the wheel right to make the cab go ________ and the trailer go ________.
right; left
left; right
left; left
2. If the drive wheels begin to spin, you should:
apply your brakes all the way.
take your foot off the accelerator.
accelerate smoothly and change gears as necessary.
3. When driving on slippery surfaces, a lack of spray from other vehicles indicates that:
the pavement is dry.
there is no ice on the road surface.
ice has formed on the road.
4. When should you downshift automatic transmissions?
When going up steep grades
When going around curves
When going down grades
5. To maintain alertness while driving, you should:
avoid heavy foods.
have another person ride with you.
All of the above.
6. When driving on wet roads, you should reduce your speed by about:
7. Excessive use of the service brakes results in overheating. Too much heat can:
make the brakes stop working.
cause the brakes apply unevenly.
cause the brakes to grab.
8. Railroad crossings with steep approaches:
can cause your unit to hang up on the tracks.
require drivers to increase their speed before crossing the tracks.
require drivers to shift gears while crossing the tracks.
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.
Pull forward against parking brake to make sure the hydraulic brakes holds.
Pump the brake pedal ten times and see if it holds.
10. Which of the following is not a rule for using turn signals?
Don't signal unless another vehicle is behind you
Signal early
Cancel your signal after you have turned
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ME CDL Knowledge Test

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