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The CDL general knowledge test is required to be taken by all CDL applicants. The Michigan 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 Michigan 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 MI 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 a vehicle is hydroplaning:
the clutch is stuck.
the tires lose their contact with the road.
the spray from large trucks reduces visibility.
2. To make the brakes work, air brakes use:
compressed air.
hydraulic air.
3. When driving on a long and/or steep downgrade, drivers should:
select an appropriate safe speed, and then use a low gear.
use a low gear and release the brakes.
release the clutch.
4. When driving on wet roads, you should:
pull of the road and get some rest.
reduce speed by about one-third.
follow the vehicle ahead more closely than under ideal driving conditions.
5. Your chances of avoiding an accident depend upon how well you take action. When you are about to hit an obstacle ahead, you should remember that:
you can almost always turn to miss an obstacle more quickly than you can stop.
stopping is always the safest thing to do in an emergency.
leaving the road is more risky than hitting another vehicle.
6. The best way to see the rear and sides of your vehicle is to:
check your mirrors regularly.
use your rear view camera.
roll down your driver's window.
7. When you have to back, you should always try to back toward the driver's side. Why?
You can see better and watch the rear of your vehicle by looking out the side window.
You can watch the front of your vehicle by looking out the side window.
All of the above.
8. Placards are used to:
indicate the maximum speed that the vehicle can travel.
indicate the maximum speed that the vehicle can reach on a level road.
identify the hazard class of the cargo.
9. What should you do if you doubt you have safe space to pass under a low bridge?
Increase the weight of your vehicle to clearing under the bridge.
Go slowly, and take another route if you are not sure you can make it.
If no warnings are posted, assume there is enough clearance under the bridge and proceed slowly.
10. Do NOT use a B:C fire extinguisher on:
electrical equipment fires.
wood fires.
gasoline fires.
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MI 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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