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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. Do NOT use a B:C fire extinguisher on:
gasoline fires.
wood fires.
electrical equipment fires.
2. The air tanks should be drained completely to remove:
carbon monoxide.
water and oil.
3. Blood Alcohol Concentration (BAC) is determined by:
how frequently you drink.
the type of alcohol you drink.
the amount of alcohol you drink.
4. Which of the following statements about accelerating is TRUE?
If the drive wheels begin to spin, speed up to regain traction.
When traction is poor, you should avoid speeding up gradually.
Rough acceleration can cause mechanical damage.
5. An anti-lock braking system (ABS):
helps you avoid skids caused by over braking.
helps you avoid wheel lock up.
All of the above.
6. If you are feeling sleepy, you should:
pull off the road and rest.
slow down.
get some coffee.
7. When driving in hot weather:
the the tires' air pressure will decrease.
the engine oil helps keep the engine cool, as well as lubricate it.
antifreeze should be avoided.
8. Hydroplaning:
can occur at speeds as low as 30 mph.
is less likely if tire pressure is low.
can occur only if there is a lot of water on the road.
9. Hydroplaning is most likely to occur:
right after it starts to rain.
right before it starts to rain.
when it's been raining for over an hour.
10. Do NOT use water on a _______ fire.
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ME CDL Practice Test

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