Instructions

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 20

Passing Score 16

1. When starting an engine:

The brakes will lock up.

Warning lights should turn on, then quickly turn off.

Coolant temperatures should decrease.

After a vehicle is started, the warning lights and buzzers should go out after a few seconds. If the warning signals do not turn off, there may be something wrong with the vehicle.

2. If there is a cargo fire in a box trailer:

The trailer doors should be opened.

The trailer doors should not be opened.

A large, heavy blanket should be put over the trailer.

The doors of a trailer should be not be opened in the event of a cargo fire, especially if the cargo includes hazardous materials. Opening trailer doors would increase the fire's oxygen supply, potentially causing the fire to increase in size.

3. When driving in fog, you should:

Slow down.

Speed up.

Drive on the shoulder.

It is best not to avoid driving in fog. However, if you must drive under foggy conditions, be sure to decrease your speed.

4. One way to prevent drowsiness while driving is to:

Drive alone.

Avoid regular exercise.

Get adequate sleep the night before the trip.

Driving while fatigued can be extremely dangerous. Strategies for preventing drowsiness while driving include getting a full night's sleep before a trip; having someone ride with you; scheduling trips for times during which you are normally awake; and avoiding medications that may cause drowsiness. Exercising regularly can increase your energy levels and make you less likely to become tired while driving.

5. When coupling together two trailers, you can secure the second trailer by:

Detaching the emergency line.

Setting wheel chocks.

Placing it at the base of a hill.

If you are attaching a second trailer to a combination, but you have doubts about the trailer's brakes, you should use wheel chocks to secure the trailer in place while coupling.

6. When using your turn signal, you should:

Signal before beginning the turn.

Turn the signal off before beginning the turn.

Signal only if vehicles are in front of you.

Always begin signaling well in advance of a turn. This is the best way to ensure that other drivers do not try to pass you. Without using a turn signal, drivers may assume that you are merely slowing down or stopping when you are planning to turn.

7. How can you tell if a converter dolly is equipped with anti-lock brakes?

The dolly is marked with a sticker displaying the letters "ABS."

There is a plaque on the side of the dolly containing the information.

There is a yellow lamp on the left side of the dolly.

Converter dollies built on or after March 1, 1998 are required to have Anti-Lock Braking Systems (ABS). The presence of ABS will be indicated by a yellow lamp on the left side of the dolly.

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