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 three possible answer choices. Test questions come from the Louisiana Commercial Driver License Manual. Questions come from chapters covering: Transporting Cargo, Combination Vehicles and Doubles and Triples. The Double/Triple endorsement can be used with the Class A CDL.

Number of Question
Passing Score

1. An emergency brake must be controlled by:

Explanation
All trucks, truck tractors, and buses must be equipped with emergency brakes and parking brakes. Because air pressure can eventually leak away, emergency and parking brakes should be held on by mechanical force.

2. Bridges usually freeze:

Explanation
Bridges tend to freeze before other parts of the roadway. Be particularly careful on bridges when temperatures are close to the freezing point.

3. When changing lanes, turn signals:

Explanation
Always signal your intentions before turning or changing lanes. Do not assume that other drivers will move out of your way simply because you are signaling to turn.

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

Explanation
Once you have begun to drive after a tire has been changed, you should stop after a short distance to recheck the tightness of the lug nuts.

5. In a dual air brake system:

Explanation
There are two air brake systems in a dual air brake system. The systems share a set of brake controls, but each system has its own tanks, hoses, and lines.

6. To help prevent a rollover, cargo should be:

Explanation
If a vehicle is top-heavy, it is more likely to roll over. The weight of cargo should be positioned as low in a trailer as possible to minimize this risk.

7. When driving on packed snow, you should reduce your speed by:

Explanation
Reduce your speed when traveling on surfaces that provide reduced traction. Reduce your speed by one-half or more when traveling on packed snow.
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