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 or four possible answer choices. Test questions come from the Wyoming Driver License Manual for Commercial and Heavy Vehicles. 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 20

Passing Score 16

1. On low bridges:

Height warnings must always be posted.

Height warnings must be posted at least twice.

Height warnings may be posted, but do not have to be.

Height warnings are often, but not always, posted on low bridges. If you are unsure if you will be able to clear an overhead object, go slowly.

2. What is a shut-off valve?

A device that prevents air from escaping an air brake system

The ignition switch

An object connected to the spring brake system

A coupling device

Shut-off valves are used in air supply lines to control the passage of air from one trailer to another. The rear shut-off valve should always be closed to prevent air from leaving the braking system.

3. If another driver is following you too closely, you should do all of the following, except:

Avoid quick changes.

Increase the distance between you and the vehicle in front of you.

Speed up.

Avoid relying on tricks to help others pass.

If you are being followed too closely, you should increase your following distance, avoid making quick moves, and avoid relying on tricks (such as flashing your lights) to help other drivers pass. Speeding up may only increase the danger by causing the tailgater to continue tailgating you at a higher speed.

4. If you don't pull the dolly out from beneath the rear trailer before unlocking the pintle hook:

The tow bar may cause injury.

The landing gear may break.

The pintle hook may detach.

Nothing bad could happen.

Never unlock the pintle hook with the dolly still under the rear trailer. This could cause the dolly tow bar to fly up, possibly causing serious injury.

5. When driving with trailers, you should:

Make quick, sudden changes.

Avoid making sudden moves.

Accelerate by pushing the accelerator to the floor.

To reduce the risk of tipping over when driving with a trailer, you should steer gently and smoothly. Avoid making sudden movements.

6. ____ are the cause of more than half of all accident-related truck driver deaths.

Truck rollovers

Motorcycles

Slippery roads

Pedestrians

More than half of all accident-related truck driver deaths are a result of truck rollovers. To help prevent a rollover, be sure to load cargo low to the ground and centered on your rig. Take corners slowly and carefully.

7. A truck should be parked:

So that it must be backed up to leave the space.

So that it can be pulled forward to leave the space.

On the grass.

Because you can't see everything behind you, backing is always dangerous and should be avoided whenever possible. Choose parking spaces from which you can pull forward when you leave.

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