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 Nevada Commercial Driver License 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. Radial and bias-ply tires:

Should be used together.

Should be used together on the front of a vehicle.

Should not be used together.

Radial and bias-ply tires should not be used together. All wheels on a vehicle should be the same style and equally-sized.

2. When backing a trailer, you must first turn the steering wheel:

In the direction you want the trailer to go.

In the direction opposite of where you want the trailer to go.

To the left.

When backing a vehicle without a trailer, a driver must turn the vehicle in the direction that they want to go. However, when backing with a trailer, the driver must begin by turning in the opposite direction. Once the trailer starts to turn, they should turn the wheel in the other direction to follow the trailer.

3. When a construction worker is close to the road, you should:

Increase your speed.

Decrease your speed.

Not drive in any lane.

Wait to proceed until the construction is complete.

In construction zones, do not exceed the posted safe sped limit. Slow down even more when workers are near the roadway.

4. If you are being tailgated, you should:

Drive on the shoulder.

Pull off the roadway.

Drive faster.

Allow the vehicle to pass.

If you are being tailgated, it is best to allow more room to open up in front of your vehicle. This will help you avoid the need for sudden stops, which could result in the tailgater rear-ending you, and will make it easier for the tailgater to pass. Speeding up may only make things more dangerous by prompting the other driver to continue tailgating you at a higher speed.

5. A stopped bus:

Is not a cause for concern since it is stopped.

Is only a concern if passengers are exiting the bus.

Is a concern whether or not passengers are visible.

You should always exercise caution when driving near a stopped bus. There could be passengers in the vicinity and the bus may either prevent them from seeing you or you from seeing them.

6. Rearward amplification refers to:

The amount of noise projected to the rear of a vehicle.

The cause of the "crack-the-whip" effect.

The number of trailers that can be pulled by a tractor.

Vehicles with trailers are vulnerable to rollover due to the "crack-the-whip" effect, which is caused by rearward amplification.

7. If an aggressive driver is involved in a crash on the road ahead of you, you should:

Block the driver in with your vehicle.

Stop after the crash scene and report the driver’s aggressive behavior to the police.

Continue driving and mind your own business.

Pull over and yell at the driver.

If you observe a crash involving an aggressive driver, you should stop a safe distance from the crash scene, wait for police to arrive, and inform them of the aggressive behavior you witnessed.

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