DOUBLES TRIPLES TEST ND - CDL 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 North Dakota doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The ND CDL doubles triples test covers the following sections of the North Dakota CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this ND CDL practice test now to prepare for the actual test! Important: Triple trailers are not legal in North Dakota.
1. The earliest way to recognize that your trailer has started to skid is:
by releasing the brakes.
by checking theĀ jackknife sensor.
by checking your mirrors.
by hearing squeaking noises from the wheels.
2. In vehicles with air brakes, the two markings on a front brake limiting valve are:
high and low.
wet and dry.
left and right.
normal and slippery.
3. To prevent rollover, you should:
drive in the left lane whenever possible.
drive faster on ramps and off ramps.
drive slower around corners.
All of the above.
4. Weight that is loaded so there is a high center of gravity:
reduces the chance that the load will shift to the side or fall off.
causes greater chance of rollover.
makes a vehicle easier to handle.
All of the above.
5. Driving in very hot weather:
can increase tire pressure.
can decrease oil pressure.
should never be done.
can make it difficult to stay in your lane.
6. With brake drums, if brakes become too hot:
your ABS will malfunction.
The brakes may stop working
the brakes will supply too much power to the drive wheels.
the air compressor will kick on to cool the brakes.
7. Skids caused by acceleration can usually be stopped by:
taking the foot off the accelerator.
speeding up.
applying the brakes firmly.
coming to a complete stop.
8. If you will be transporting hazardous materials that require placards, you must:
ask permission of the local transportation agency.
obtain a special transit permit.
obtain a hazardous materials endorsement.
transport the materials at night only.
9. Which of the following statements about backing heavy vehicles is true?
Back to the right side so that you can see better.
The helper should stand where you cannot see the helper.
Always back as quickly as possible.
You should avoid backing whenever you can.
10. Which of these describes the proper braking technique when driving on a long and steep downgrade?
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.
Release the brakesĀ 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.
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.
All of the above.
 
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ND CDL Doubles Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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