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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 should you turn the retarder off?
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when your vehicle has a high center of gravity.
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when the cargo is heavy.
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when the road is slippery.
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when the cargo is prone to shifting.
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2.
Which of the following statements about backing heavy vehicles is true?
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Always back as quickly as possible.
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Back to the right side so that you can see better.
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The helper should stand where you cannot see the helper.
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You should avoid backing whenever you can.
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3.
A trailer jackknife is more likely to happen when the trailer is:
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empty.
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overloaded.
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loaded to its full capacity.
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None of the above.
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4.
Which of the following will NOT help you prevent rollover?
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Driving slowly around turns.
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Keeping the cargo as close to the ground as possible.
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Using the controlled braking method.
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All of the above.
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5.
Off-tracking is:
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when a vehicle towing a trailer skids, and the trailer pushes the towing vehicle from behind until it spins the vehicle around.
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when the tires lose their contact with the road and have little or no traction.
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when a vehicle makes a turn and the rear wheels of the trailer end up driving in a different path than the tractor and the front wheels of the trailer.
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None of the above.
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6.
Texting while driving a CMV is:
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acceptable if the message work-related.
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prohibited.
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acceptable if the message less than 140 characters.
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safer than talking on the phone.
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7.
The ABS malfunction lamp on the instrument panel is:
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Blue
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Yellow
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Orange
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Red
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8.
When driving double and triple trailers, drivers should:
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steer gently and go slowly around corners.
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look far ahead.
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allow more following distance.
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All of the above.
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9.
Which of the following statements is true?
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There is no way that short circuits due to damaged insulation can cause a vehicle fire.
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Under-inflated tires will NOT cause a vehicle fire.
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Carrying a properly charged and rated fire extinguisher will help prevent fires.
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Poor cargo ventilation is a common cause of fire.
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10.
If an aggressive driver is involved in an accident down the road, you should:
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confront the aggressive driver.
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try to get their vehicle to the side of the road.
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make eye contact with the driver.
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stop a safe distance from the accident scene, wait for the police and report the behavior you witnessed.
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