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. Before starting down a hill, you should:

Explanation
Always downshift before beginning to drive downhill. Take the hill at a speed that does not require you to overuse your brakes.

2. After a tire has been changed, the driver should stop after a short distance to:

Explanation
After a tire has been changed, you should stop a short while later to re-check the tightness of the lug nuts.

3. When it is difficult to see, such as at dawn or dusk, what is the best way to make your vehicle more visible?

Explanation
In conditions of poor visibility (such as at dawn, at dusk, in rain, or in snow), you should turn on your low beam headlights to make your vehicle easier to see. Do not use your high beams when driving near other vehicles.

4. When driving on a long downhill slope, you should brake by:

Explanation
When approaching a long downgrade, you should shift into a lower gear then use proper braking techniques. Using the brakes alone could cause them to overheat and fail. The braking power of the engine, which is maximized by being in a lower gear, will be the principal way of controlling your speed on a downgrade.

5. During a pre-trip inspection, belts in the engine compartment should be:

Explanation
During a pre-trip inspection, belts in the engine compartment should be checked for tightness and excessive wear.

6. What can the “crack-the-whip” effect do?

Explanation
The "crack-the-whip" effect can cause a trailer to turn over during a lane change. To avoid this phenomenon, drivers should make lane changes at slow, safe speeds.

7. When stopping in an emergency situation, you should:

Explanation
If you need to make an emergency stop, you can use either the controlled braking method or the stab braking method. It's important to brake in a way that keeps your vehicle in a straight line but will still allow you to turn if necessary.
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