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Wisconsin 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 Wisconsin Commercial Driver’s Manual. 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.
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Passing grade —
4 or fewer errors
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8.
Which type of brakes do most heavy-duty vehicles have?
Air brakes
Solid brakes
Liquid brakes
Gravity brakes
9.
What is a bobtail tractor?
A tractor without a trailer
A tractor attached to two trailers
A tractor with a tank
10.
If a truck is equipped, a trailer brake hand valve can be used to:
Add fuel to the vehicle.
Prevent the vehicle from rolling back when being started from a stop.
Check the oil level.
Load cargo.
11.
When parking, you should:
Share a parking lot with automobiles.
Park in a way that will prevent you from having to back up.
Ask drivers of smaller vehicles to move.
12.
Before a trip, make sure the glide plate is:
Detached from the vehicle.
Far from the upper fifth wheel.
Securely mounted to the trailer frame.
13.
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.
14.
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.
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