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

8. When inspecting a power steering-equipped vehicle, you should be sure that:

Explanation
When inspecting a vehicle equipped with power steering, check the hoses, pumps, and fluid level. Be sure to check for and repair leaks before operating the vehicle.

9. When backing a trailer, how should you turn the steering wheel?

Explanation
When backing with a trailer, turn the top of the steering wheel in the direction opposite of where you want to go. Once the trailer begins turning, you should then switch the direction of the steering wheel to follow the trailer.

10. Convex mirrors:

Explanation
Many large vehicles have curved, convex mirrors. Convex mirrors allow drivers to see a wider area than flat mirrors. However, they also make objects seem smaller and farther away than they really are.

11. To make driving at night easier, you should:

Explanation
If the interior of your cab is too bright when you are driving at night, you may have difficulty seeing things outside. Keep the interior light off and adjust your instrument lights to the lowest possible level that still allows you to easily read the gauges.

12. If using a helper while backing a vehicle, where should they stand?

Explanation
If you use a helper while backing your vehicle, they should stand near the back of the vehicle in a place where they are visible to you. Before backing, work out a set of hand signals that both you and your helper understand. Agree on a signal for "stop."

13. When preparing to enter traffic, you should do all of the following, except:

Explanation
When crossing or entering traffic, bear in mind the size of your vehicle and the distance it will need to accelerate. Wait for a gap in traffic that is large enough to accommodate your vehicle before you begin to accelerate. Remember that you will need more room to accelerate if your vehicle is heavily loaded. Before crossing a road, be sure that you can get all the way across without interfering with traffic.

14. An example of mandatory emergency equipment is:

Explanation
Mandatory emergency equipment includes: at least one fire extinguisher; spare electrical fuses (unless the vehicle is equipped with circuit breakers); and warning devices for parked vehicles (such as reflective triangles).
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