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Wyoming 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 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.
You have made error so far
Passing grade —
4 or fewer errors

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

When driving with trailers, you should:

Make quick, sudden changes.
Avoid making sudden moves.
Accelerate by pushing the accelerator to the floor.

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

Truck rollovers
Slippery roads

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.

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.

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.

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.
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