MINNESOTA CDL DOUBLES TRIPLES PRACTICE TEST
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Safely pulling double and triple trailers requires knowledge and skill. If you want to pull double or triple trailers, you must add the Doubles/Triples (T) endorsement to your Class A CDL. The Minnesota doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The MN CDL doubles triples test covers the following sections of the Minnesota CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this MN CDL practice test now to prepare for the actual test!
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1.
Which of the following is not a braking system on a truck?
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Service brake
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Emergency brake
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Parking brake
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Steering brake
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2.
You must have at least 4/32 inch tread depth in every major groove on front tires and at least ___ inch on other tires.
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4/32
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3/32
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1/32
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2/32
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3.
On any upgrade, gravity:
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speed you up.
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doubles your speed.
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doesn't affect your speed.
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slows you down.
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4.
Your mirrors should be adjusted so that:
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the rear of the vehicle is visible in the mirror.
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more than half of the mirror shows the vehicle.
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no part of the vehicle is visible in the mirror.
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a part of the vehicle is visible in the mirror.
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5.
When you double your speed, the braking distance is:
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3 times longer.
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the same.
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2 times longer.
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4 times longer.
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6.
If there is a fire and you are not sure what to use to put it out, you should:
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use water.
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wait for firefighters.
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use dry powder.
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use a fire extinguisher.
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7.
The earliest way to recognize that your trailer has started to skid is:
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by checking your mirrors.
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by releasing the brakes.
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by hearing squeaking noises from the wheels.
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by checking the jackknife sensor.
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8.
To warn drivers behind you when you see you'll need to slow down, you should:
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flash the brake lights.
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sound your horn.
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turn off your lights.
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use your headlights.
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9.
Which of these describes the proper braking technique when driving on a long and steep downgrade?
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Apply the brakes. When your speed has been reduced to 5 mph below your safe speed, release the brakes. When your speed has increased to your safe speed, repeat the previous steps.
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Release the brakes until your speed is 5 mph above your safe speed, then apply the brakes. When your speed has decreased to your safe speed, repeat the previous steps.
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Apply the brakes until your speed has been reduced to 5 mph, then release the brakes. When your speed has increased to your safe speed, repeat the previous steps.
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All of the above.
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10.
A bridge formula permits:
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more maximum axle weight for axles that are closer together.
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less maximum axle weight for axles that are close together.
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more maximum axle weight for axles that are far apart.
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less maximum axle weight for axles that are far apart.
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Doubles Triples MN CDL Test
| Number of questions: | 20 |
| Correct answers to pass: | 16 |
| Passing score: | 80% |
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