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Louisiana CDL Permit Test - Double

Number of questions: 20
Passing score: 16
Directions: 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.
You have made error so far
Passing grade —
4 or fewer errors

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.

One way to prevent drowsiness while driving is to:

Drive alone.
Avoid regular exercise.
Get adequate sleep the night before the trip.

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.

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.

When starting an engine:

The brakes will lock up.
Warning lights should turn on, then quickly turn off.
Coolant temperatures should decrease.

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.

When driving in fog, you should:

Slow down.
Speed up.
Drive on the shoulder.
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