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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 Rhode Island doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The RI CDL doubles triples test covers the following sections of the Rhode Island CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this RI CDL practice test now to prepare for the actual test!
1.
Watch out for black ice:
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when the temperature is above freezing and the road is dry.
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when it is snowing.
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any time the temperature is below freezing and the road looks wet.
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2.
At dawn, dusk, in rain or snow, to make yourself easier to see you should:
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use the low beams.
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use the emergency flashers.
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use the high beams.
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3.
What is the minimum tread depth for tires other than front tires?
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2/32 inch
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8/32 inch
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4/32 inch
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4.
If the drive wheels begin to spin, you should:
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take your foot off the accelerator.
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apply your brakes all the way.
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accelerate smoothly and change gears as necessary.
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5.
When you turn suddenly while pulling doubles, which trailer is most likely to turn over?
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The rear trailer is twice as likely to turn over as the tractor.
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The front trailer is twice as likely to turn over as the tractor.
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All trailers are equally likely to turn over.
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6.
If there is a cargo fire in a van or box trailer, you should:
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enlist the help of bystanders.
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open the doors, especially if your cargo contains hazardous materials.
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keep the doors shut.
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7.
Which of the following is a common cause of truck fires?
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Under-inflated tires and duals that touch.
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Short circuits due to loose connections.
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All of the above.
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8.
When you turn suddenly, which trailer is most likely to turn over?
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The last trailer of triples
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The front trailer
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The rear trailer of doubles
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9.
Hanging meat in a refrigerated truck can be:
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a very unstable load with a low center of gravity.
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a very unstable load with a high center of gravity.
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a very stable load if properly distributed.
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10.
When driving double and triple trailers, drivers should:
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allow more following distance.
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steer gently and go slowly around corners.
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All of the above.
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