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 Maryland Commercial Driver Guide. 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. Drivers talking to passengers in their vehicle should be viewed as:

Responsible drivers.

Distracted drivers.

Knowledgeable drivers.

Drivers who are engaged in conversation with passengers may be distracted from the task of driving. Use extra caution when driving near distracted drivers.

2. Which of the following is a sign that brakes will need repair?

Brake pads are not covered in grease.

Brake pads are not covered in oil.

Brake shoes are worn thin.

When inspecting your brakes, you should check for cracked drums; shoes or pads covered in oil, grease, or brake fluid; and shoes that are missing, broken, or worn dangerously thin.

3. When should mirrors be adjusted?

Before driving

While driving

After driving

Mirror adjustment should be checked prior to the start of any trip. If your vehicle has a trailer, the trailer must be straight in order for the mirrors to be checked accurately.

4. Rolling backward when beginning to accelerate is dangerous because:

The transmission may be damaged.

The truck is not made to go backwards.

You may hit a vehicle behind you.

Be sure that you are able to accelerate without first rolling back. Rolling backwards may cause you to collide with a vehicle or other obstacle behind your truck.

5. When driving a 50-foot truck at 50 mph, your minimum following distance should be:

Four seconds.

Five seconds.

Six seconds.

At speeds below 40 mph, you should allow at least one second of following distance for every 10 feet of your vehicle. When traveling at higher speeds, follow the same formula, then add one additional second to your following distance.

6. When backing with a trailer, you should:

First turn the steering wheel in the direction of the turn.

First turn the steering wheel in the direction opposite of the turn.

Turn the wheel as sharply as possible.

Not use the brakes.

When backing a straight truck, you would turn the wheel in the direction you want to go. By contrast, when backing a vehicle with a trailer, you must turn the steering wheel in the direction opposite of where you want to go. Once your trailer starts to turn, you should turn the steering wheel the other way to follow the trailer.

7. On a curve, the posted speed limit:

Is safe to be driven in any vehicle.

Can still permit a vehicle to tip over.

Is understood to be the minimum legal speed limit.

The posted speed limit on a curve may be safe to be taken by cars, but can still be too fast to be taken by larger vehicles, such as trucks. An operator driving their truck at the posted limit on a curve could cause their vehicle to tip over.

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