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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.
When driving a 50-foot truck at 40 mph, your minimum following distance should be:
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8 seconds
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4 seconds
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5 seconds
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6 seconds
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2.
Your vehicle has air brakes. To stop, you should:
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push the brake pedal down.
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release the accelerator, push in the clutch, and shift to Neutral at the same time.
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pull the parking brake control knob out.
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pump the brake pedal 3 times.
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3.
Right after it starts to rain, the road is very slippery. Why?
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Because black ice may form on the road.
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Because the water mixes with oil left on the road by vehicles.
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Because rain is very slippery.
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None of the above.
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4.
If coolant has to be added to a system without a recovery tank, you should:
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turn the radiator cap quickly to the first stop.
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never use thick cloth to touch the radiator cap.
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wait until the engine has cooled before adding coolant.
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keep the engine running while adding coolant.
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5.
When checking the engine compartment in a vehicle inspection, you should check all of the following except:
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Coolant level in radiator
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Shock absorbers
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Windshield washer fluid level
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Engine oil level
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6.
If you cannot make a right turn without entering another traffic lane, you should:
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watch out for vehicles coming toward you and back up for them.
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turn wide before you start the turn.
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turn wide as you complete the turn.
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swing wide to the left before starting the turn.
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7.
If your ABS malfunctions:
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you still have normal brake functions.
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you should immediately come to a complete stop.
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the parking brakes will not work.
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the service brake will not work.
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8.
Which of the following vehicles is most likely to turn over?
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65 ft. conventional double
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5 axle tractor semitrailer
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Triple trailer
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3 axle tractor semitrailer
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9.
Air tank drains:
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should not be used in wet weather.
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are used to remove water and oil from the air tanks.
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are used to move air to the brakes.
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protect the tanks and the rest of the system from too much pressure.
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10.
If your trucks has a high center of gravity, which of the following is true for curves?
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Reduce your speed to a crawl.
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You should travel at the posted speed limit.
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You should slow down, as your truck can roll over at the posted speed limit for the curve.
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None of the above.
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