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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 Florida doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The FL CDL doubles triples test covers the following sections of the Florida CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this FL CDL practice test now to prepare for the actual test!
1.
On any upgrade, gravity:
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doubles your speed.
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speed you up.
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doesn't affect your speed.
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slows you down.
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2.
When parking a trailer without spring brakes, it is very important for safety that you use wheel chocks. Why?
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The air could leak out of the trailer air tank, releasing its emergency brakes.
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You may not notice a major leak in the service line until you try to put the brakes on.
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if you don't use wheel chocks, supply air will be sent to the service line instead of going to charge the trailer air tanks.
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None of the above.
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3.
When coupling a double or triple, ________ should be attached last.
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the middle trailer.
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the trailer right behind the cab.
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the more heavily loaded trailer.
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None of the above.
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4.
Engine oil pressure should come up to normal within _________ after the engine is started.
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two minutes
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seconds
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ten minutes
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five minutes
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5.
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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loose fuel connections.
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Short circuits due to loose connections.
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All of the above.
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6.
Empty trucks:
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require shorter stopping distances than fully-loaded trucks.
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have better traction than fully-loaded trucks.
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may have poor traction.
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None of the above.
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7.
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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8.
If there is a fire and you are not sure what to use to put it out, you should:
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use dry powder.
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use a fire extinguisher.
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use water.
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wait for firefighters.
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9.
It's very important to distribute the cargo so it is:
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as high up as possible.
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in the centre of the load.
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piled up.
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as low as possible.
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10.
Doubles and triples:
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can be turned suddently due to the low center of gravity.
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can be stopped suddenly due to their weight.
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have a lower chance of skidding.
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can't be turned suddenly.
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