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Safely pulling double and triple trailers requires knowledge and skill. If you want to pull double or triple trailers, you must add the Doubles/Triples (T) endorsement to your Class A CDL. The Oregon doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The OR CDL doubles triples test covers the following sections of the Oregon CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this OR CDL practice test now to prepare for the actual test! Important: Triple trailers are not legal in Oregon.
1.
To warn drivers behind you when you see you'll need to slow down, you should:
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sound your horn.
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flash the brake lights.
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turn off your lights.
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use your headlights.
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2.
If your brakes fail on a steep mountain downgrade, you should:
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slow down until your vehicle comes to a complete stop.
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set the parking brake and park in an open area.
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stay on the road and keep looking for the next available escape ramp.
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decide what to do as soon as you know your brakes do not work.
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3.
To make the brakes work, air brakes use:
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hydraulic air.
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nitrogen.
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compressed air.
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carbon monoxide.
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4.
Which of these describes the proper braking technique when driving on a long and steep downgrade?
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Release the brakes until your speed is 5 mph above your safe speed, then apply the brakes. When your speed has decreased to your safe speed, repeat the previous steps.
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Apply the brakes. When your speed has been reduced to 5 mph below your safe speed, release the brakes. When your speed has increased to your safe speed, repeat the previous steps.
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Apply the brakes until your speed has been reduced to 5 mph, then release the brakes. When your speed has increased to your safe speed, repeat the previous steps.
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All of the above.
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5.
Before driving a vehicle with a dual brake brake system, the driver should:
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wait at least 5 minutes before driving.
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allow time for the air compressor to build up a minimum of 100 psi pressure in both the primary and secondary systems.
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wait at least 10 minutes before driving.
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pump the brake pedal 10 times to build pressure.
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6.
If you must stop on a one-way or divided highway, you should place warning devices _______ toward the approaching traffic.
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5, 50 and 500 feet
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10, 100 and 200 feet
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5, 25 and 50 feet
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3, 15 and 45 feet
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7.
When the wheels of a trailer lock up, which of the following is most likely to occur?
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The trailer will tend to swing around (trailer jackknife).
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The trailer will tend to push the towing vehicle sideways (tractor jackknife).
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The rig will stay in a straight line but slide sideways.
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The trailer will the trailer
has overturn.
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8.
Truck tractors with air brakes built after March 1, 1997, are required to be equipped with:
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anti-lock brakes.
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a rear backup camera.
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GPS
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hydraulic brakes.
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9.
If an item placed on a flatbed trailer is 7 feet long, it should have __ tie-downs.
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2
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1
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3
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7
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10.
When possible, you should park:
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on the roadway.
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on the shoulder.
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so you will be able to pull forward when you leave.
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so you will have to back up when you leave.
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Frequently Asked Questions
In Oregon, individuals aged 15, 16, and 17 can obtain a provisional instruction permit. If you're between 16 and 17, you become eligible for a provisional driver license after holding an instruction permit for a period of 6 months. When you turn 18, you can obtain a full driver license (class C).
You can take the DMV written test online using a computer (mobile phones or tablets are not permitted). If you are under 18, it's necessary to have the supervision of an adult aged 21 or older, who possesses a social security number and has not proctored more than five tests in the last year. Alternatively, you can visit an Oregon DMV office as a walk-in or schedule an appointment for the permit test.
Ensure you prepare these documents when applying for a driver’s license:
- Proof of legal presence, identity, and date of birth.
- Proof of residence address (two documents for Real ID).
- Parent/Guardian certification form signed by your parent/guardian if they cannot accompany you to the office (for those over 18 or minors married or emancipated, this is not required).
- Proof that you are attending high school or your diploma/GED certificate (for those under 18).
You can start the pre-application online and bring the required documents when you go to the DMV office.
The online DMV written test is offered in English and Spanish. If taken in a DMV office, it's available in English, Spanish, Arabic, Chinese, Japanese, Korean, Russian, and Vietnamese. You can also use a paper foreign language translation dictionary with permission, and audio assistance is additionally provided.
To prepare for the DMV written test, read the Oregon Driver's Handbook or listen to the audio version available in English and Spanish. Study road signs, safe driving practices, and traffic laws. You can test your knowledge with our free practice tests. Once you are satisfied with your score, you are ready for the exam.
The DMV written test consists of 35 multiple-choice questions covering topics such as traffic signs, parallel parking, turning, passing a vehicle, yielding the right of way, etc. Read the manual carefully because it's not permitted to use it or any notes during the official test. If you want to test your preparation, sign up for DMV Premium!
You are allowed up to 7 wrong answers. This means that the passing score is 80%. It's important to stay focused during the exam and take the time to read the questions carefully to minimize errors and pass on the first attempt.
For new drivers in Oregon, specific restrictions apply based on their age and licensing stage.
Instruction permit’s restrictions:
- You can drive only if accompanied by a licensed adult who is at least 21 and seated beside you.
- Using a cell phone or other mobile device is prohibited.
Provisional driver license’s restrictions (until you turn 18 or have had your provisional license for 1 year):
- For the first six months...
- You cannot drive with passengers under 20, except for family members or when supervised by an instructor, parent, or guardian with a license.
- Driving between midnight and 5:00 AM is forbidden, except for work, school events, or when supervised by a licensed driver aged at least 25.
- During the second six months...
- You can drive with a maximum of three passengers under 20, except for family members or when supervised by an instructor, parent, or guardian with a license.
- Driving between midnight and 5:00 AM is forbidden, except for work, school events, or when supervised by a licensed driver aged at least 25.
- Using a cell phone or other mobile device is prohibited until you turn 18.
An Oregon instruction permit is valid for 2 years. If it expires, you can apply for a new one, which remains valid for 24 months. No vision or knowledge tests are required unless the permit has expired for 1 year or more. To renew the permit a fee is required and you have two options:
- Renew it online and receive an online receipt to use as proof of your driving privileges until your license is mailed to your address.
- Schedule an appointment at a DMV office and receive an interim card as proof of valid driving privileges until your license is mailed to your address.
If you don't pass your DMV written test, a waiting period of at least one day is required before you can retake it. After four unsuccessful attempts, you have to wait at least 28 days. For individuals who have taken the permit test online, any further attempts beyond the fourth must be made at a DMV office. If you are caught cheating, you will automatically fail, and you can retake the exam after 90 days.