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 South Dakota 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. When should a driver sign a vehicle inspection report?

After every trip

If noted defects are repaired

After each fueling

You must sign a vehicle inspection report only if defects were noted and either certified to have been repaired or certified as not needing to be repaired.

2. Of the following, which is not a recommended way to spot potential signs of trouble?

Watching the gauges

Using your senses

Checking critical items only at the beginning and end of a trip

During a trip, you should regularly make checks to ensure that your vehicle is operating properly. Check the instrument panel and gauges; look at your mirrors; and examine the tires, cargo, and lights. Use all of your senses and be alert for anything that could be an early indication of trouble.

3. Which of the following is not a good rule when using turn signals?

Signal early. Signal well before a turn or lane change.

Signal continuously. Do not cancel a signal until the turn is completed.

Don’t over-signal. If no one is near you, there is no need to signal.

When using your turn signals, you should signal well before the turn or lane change, signal continuously throughout the turn or lane change, and cancel the signal after you have completed your move.

4. On a slippery road, a driver should:

Make turns as quickly as possible.

Refrain from passing slower vehicles.

Stop quickly.

Under slippery conditions, you should drive slowly and smoothly. Make turns as gently as possible and do not pass other vehicles unless you have to.

5. Texting while driving is especially dangerous because:

It is both a mental and physical distraction.

A message may be upsetting to the driver.

People like to read and may become too engaged in their phones.

Texting while driving is particularly dangerous because it is both a mental and physical distraction to the driver. In addition to diverting a driver's mental attention away from the road, texting requires a person to remove at least one hand from the vehicle's controls.

6. One way to avoid becoming an aggressive driver is to:

Talk on your cell phone while driving.

Question others' driving abilities.

Set realistic expectations regarding travel time.

To help avoid frustration, which can lead to aggressive driving behavior, you should begin a trip with realistic expectations about your travel time. Plan ahead to allow time for potential traffic delays. Other strategies to help prevent aggressive driving behavior include driving an appropriate speed and keeping a reasonable following distance; avoiding making gestures at other drivers; and keeping your hands on the steering wheel.

7. Since doubles and triples should be driven smoothly to prevent rollover, a driver should:

Drive on the shoulder whenever possible.

Drive faster than the posted speed limit.

Look far ahead of their vehicle to react to problems early.

Add extra grease to connections.

To enable smooth driving while operating a double or triple, you should consistently watch far ahead of your vehicle. Doing this will allow you to slow down or change lanes gradually when reacting to any upcoming hazards.

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