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 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.

Number of Question 20

Passing Score 16

1. To ensure that you do not slow down traffic when driving a large truck, you should:

Switch gears while driving uphill.

Try to pass another vehicle while driving uphill.

Stay in the right lane whenever possible.

If a heavy load prevents your vehicle from keeping up with the speed of other traffic, you should stay in the right lane.

2. To make it as safe as possible to leave a stop, you should park:

So that you must back up to leave your parking space.

So that you can pull forward to leave your parking space.

On the side of a roadway, not in a parking lot.

By backing into a parking space.

Backing can be dangerous, so avoid doing it whenever you can. If possible, park in such a way that allows you to pull forward to exit your parking space.

3. You are especially likely to encounter strong winds when:

Coming out of tunnels.

Going into tunnels.

Driving on shoulders.

Strong winds can make it difficult to keep a vehicle in its proper lane. Strong wind can be a particular problem when a vehicle is being driven out of a tunnel.

4. Air storage tanks:

Are not allowed on a vehicle.

Hold compressed air for the brakes.

Should be drained of excess air after every trip.

In an air brake system, the air storage tanks hold compressed air to be used by the brakes. The number and size of air tanks varies among vehicles.

5. A truck tractor built after March 1, 1997 must be equipped with:

An Anti-Lock Braking System (ABS).

A flag.

Hydraulic brakes.

Truck tractors with air brakes built on or after March 1, 1997 are required to be equipped with Anti-Lock Braking Systems (ABS).

6. If you have an engine fire, you should:

Open the hood as soon as possible.

Turn off the engine as soon as possible.

Not use a fire extinguisher.

To keep an engine fire from spreading, you should turn off the vehicle's engine as soon as possible. Do not open the hood if you don't have to.

7. When backing, it is best to:

Rely only on the passenger’s side mirror.

Try to back up quickly.

Turn toward the passenger’s side whenever possible.

Use a helper, if possible.

If you must drive in reverse, you should back up slowly and use the mirrors on both sides of your vehicle. Use a helper to monitor your blind spots whenever possible. You and the helper should agree on a signal for "stop."

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