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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. Which of the following is true about curved mirrors?
They are illegal in most States.
In a curved mirror things seem closer than they really are.
In a curved mirror everything appears smaller than it would if you were looking at it directly.
2. Drivers should not assume that the heights posted at bridges and overpasses are correct. Why?
Packed snow or repaving may have reduced the clearances since the heights were posted.
The weight of a cargo van changes its height.
Some roads can cause a vehicle to tilt.
3. If you are convicted of a traffic violation (except parking) in your personal vehicle:
your commercial driver license will not be affected.
you don't have to tell your employer.
you must tell your employer.
4. If you're carrying hazardous materials and are stopped at a truck stop, you should:
keep the shipping papers with you.
leave the shipping papers in the driver’s door pouch or on the driver’s seat.
leave the shipping papers on the dashboard in clear view.
5. In a convex mirror everything appears:
6. If a load is placed on one side of the trailer:
making turns may be easier.
a rollover is more likely.
the steering axle weight will be too light to steer safely.
7. During a hazardous materials emergency, you should:
keep everyone away.
prevent smoking and keep open flames away.
All of the above.
8. If you see a hazard ahead, you should:
come to a complete stop when safe to do so.
think about the emergencies that could develop and be prepared to take action.
call the emergency services.
9. Convex mirrors:
make things appear closer than they really are.
make objects appear larger than they really are.
show a wider area than flat mirrors.
10. To keep your vehicle from rolling back when you start, you should:
partly engage the clutch before you take your foot off the brake.
turn the engine off before you take your foot off the brake.
apply the emergency brake whenever necessary.
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ME CDL Knowledge Test

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