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The CDL general knowledge test is required to be taken by all CDL applicants. The Oregon 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 Oregon 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 OR 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 statements about tire failure is true?
If the steering feels heavy, it may be a sign one of the rear tires has failed.
Any time you hear a tire blow, you would be safest to assume it is not yours.
It can take a few seconds for your vehicle to react, and you might think it was some other vehicle.
All of the above.
2. When driving at night, you should dim your lights within _____ of an oncoming vehicle and when following another vehicle within _____ .
200 feet ; 100 feet
300 feet ; 50 feet
200 feet ; 200 feet
500 feet ; 500 feet
3. When shifting up, you should release accelerator, push in clutch and shift to neutral at the same time, and then?
Push in the clutch again
Release the clutch
Press the accelerator
Shift up
4. You cannot inspect sealed loads, but you should:
make sure the cargo is piled up high.
check that the lightest parts of the cargo are under the heaviest parts.
check that you do not exceed gross weight and axle weight limits.
check that the content matches the description on the shipping paper.
5. Why should you avoid driving too near the edge of the road?
To keep other vehicles from passing you.
To get a better view of the road ahead.
Driving too near the edge of the road can cause the top of your vehicle to hit roadside objects.
All of the above.
6. Drivers should not assume that the heights posted at bridges and overpasses are correct. Why?
Some roads can cause a vehicle to tilt.
Packed snow or repaving may have reduced the clearances since the heights were posted.
The weight of a cargo van changes its height.
The bridge/overpass may have been rebuilt since the heights were originally posted.
7. When driving in very hot weather, you may have to:
increase your speed until the tires cool off.
decrease your following distance.
watch out for black ice.
reduce your speed to prevent overheating.
8. Shaded parts of the road:
will melt before open areas.
usually are not slippery.
will remain icy and slippery after other areas have melted.
usually don't freeze.
9. Interstate commerce means trade, traffic, or transportation in the U.S. that is between:
Two places in the state as part of trade, traffic, or transportation originating or terminating outside the state or U.S.
Two places in the state through another state or a place outside of the U.S.
A place in a state and a place outside such state or outside the U.S.
All of the above.
10. When should you use the 4-way emergency flashers instead of flashing the brake lights to warn the drivers behind you?
At night time.
When you are driving very slowly or are stopped.
When visibility is poor.
When driving in strong winds.
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CDL Knowledge Test OR

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