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 possible answer choices. Test questions come from the Virginia 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. Which of the following will not help prevent a rig from rolling over?

Keeping the cargo as close to the ground as possible

Driving slowly around turns

Driving on the shoulder of a road

To help prevent a rig from rolling over, you should keep the weight of the cargo as close to the ground as possible when loading. You should also drive slowly around turns.

2. How does doubling your speed from 20 mph to 40 mph affect your vehicle's braking distance?

It stays about the same.

It doubles.

It quadruples.

Increasing your vehicle's speed will increase your vehicle's striking power and braking distance. Doubling your vehicle's speed from 20 to 40 mph will quadruple its braking distance.

3. If a tire fails, you should:

Use the brakes.

Stay off the brakes.

Swerve.

Braking after a tire fails can result in a loss of control. Stay off your brakes, if possible, until your vehicle has slowed considerably.

4. When backing a truck, you should:

Only use the side mirrors on the driver’s side.

Use both side mirrors.

Never use a helper.

Backing a commercial motor vehicle is always dangerous because you cannot see everything behind you. When backing, make frequent checks of the mirrors on both sides of the vehicle. Use a helper whenever possible.

5. One way to prevent fatigue on long trips is to:

Take frequent breaks.

Text while driving.

Drink caffeine.

To avoid becoming fatigued on a long trip, you should take a break after every 100 miles or two hours of driving. Driving through the night, or during any other time when you would normally be asleep, raises the danger of fatigue.

6. When starting a vehicle, the oil pressure should:

Gradually build up pressure over the span of a few minutes.

Come up to normal within a few seconds.

Start high, then decrease as the engine is run.

Oil pressure should come up to normal within seconds of starting the engine.

7. The best way to recognize that your trailer has started to skid is by:

Seeing other drivers' faces.

Checking the trailer in your mirrors.

Feeling the trailer move.

The easiest way to become aware that your trailer has begun to jackknife is to observe it in your mirrors. Checking your trailer in your mirrors will also allow you to spot any skidding at the earliest possible moment.

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