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 four possible answer choices. Test questions come from the Kansas Commercial Driver’s Manual. Questions come from chapters covering: Driving Safely, Cargo, 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
Passing Score

1. A double or triple:

Explanation
Double and triple trailers are less stable than single commercial vehicles and are more likely to roll over when being driven. To prevent rollovers, doubles and triples must be driven very smoothly and gently.

2. If federal inspectors judge your vehicle to be unsafe, they can:

Explanation
If a federal or state inspector judges a CMV to be unsafe, they may put it out-of-service until it is fixed.

3. When parked on the side of the road, you should:

Explanation
Always turn on your four-way emergency flashers if you must park on the side of the road. This is especially important when traveling at night.

4. If hydraulic brakes fail, a driver can reduce their speed by:

Explanation
If your hydraulic bakes fail, shifting into a lower gear can help slow your vehicle down.

5. What is off-tracking?

Explanation
When a vehicle goes around a corner, the rear wheels follow a different path than the front wheels. This is known as off-tracking, or "cheating."

6. A fatigued driver:

Explanation
If you are fatigued, you will not see or react to hazards as quickly as you would if you were fully energized and awake. You will be impaired in making critical decisions.

7. Most heavy-duty vehicles use ____ air brake systems.

Explanation
The majority of heavy-duty vehicles are equipped with dual air brake systems.
DMV Writen Test Logo