Double

This endorsement is required if the driver will pull two or three trailers. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice.. Read More

This endorsement is required if the driver will pull two or three trailers. To receive this endorsement, applicants must pass a test. The test consists of 20 multiple choice questions. To pass, the applicant must answer at least 16 questions correctly. Each question has two, three or four possible answer choices. Test questions come from the Utah Commercial Driver License Handbook. Questions come from chapters covering: Driving Safely, Air Brakes (if applicable), Combination Vehicles and Doubles and Triples. The Double/Triple endorsement can be used with the Class A CDL.

Number of Question
Passing Score

1. Be sure you are always driving so your vehicle can stop:

Explanation
Always be sure that you are driving in a manner that will allow your vehicle to come to a complete stop, if necessary, within the area of the road ahead that you are able to see.

2. If turning to avoid a hazard:

Explanation
If you are turning to avoid a hazard, do not apply the brakes while you are turning. This could easily lock the wheels and create a skid.

3. While driving a triple combination, keep the shut-off valves at the rear of the middle trailer in their:

Explanation
When operating a double or triple, the shut-off valves at the rear of last trailer should be closed. All other shut-off valves should be open.

4. Brakes may get out of adjustment:

Explanation
Brakes can get out of adjustment quickly, especially if they are used to the point of overheating. Brake adjustment should be checked frequently.

5. Which of the following is not a potential effect of drinking alcohol then driving?

Explanation
Driving errors that may be caused by alcohol-induced impairment include straddling lanes; quick, jerky starts; failure to signal or use lights; running stop signs and red lights; and improper passing. A driver's reaction time will become poor when they are under the influence of alcohol.

6. Eating while driving is:

Explanation
Smoking, eating, or drinking are distracting activities and should be avoided while you are driving. Instead, plan ahead and allow yourself time to stop to eat when making a lengthy trip.

7. When a vehicle goes around a corner, the rear wheels:

Explanation
When any vehicle goes around a corner, the rear wheels follow a different path than the front wheels. This is called off-tracking. The degree of off-tracking will be greater on long vehicles than on short vehicles.
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