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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 Vermont doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The VT CDL doubles triples test covers the following sections of the Vermont CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this VT CDL practice test now to prepare for the actual test!
1. When stopping you should push the brake pedal down:
2. You should NOT use the parking brakes if:
the brakes are very hot.
the brakes are cold.
the brakes are too dry.
3. Before each trip, you must make sure:
the cargo is balanced and secured.
the cargo has a high center of gravity.
your cargo obscures your view to the sides.
4. When your vehicle starts to skid, you must take action to:
accelerate and countersteer.
restore traction to the tires.
use controlled braking.
5. When inspecting the coupling, how much space should there be between the upper and the lower fifth-wheel?
½ inch
It depends on the trailer
6. To reduce the chance of rollover, you should:
distributed the cargo as low as possible inside the trailer.
place the cargo as high as possible inside the trailer.
put the lightest parts of the cargo under the heaviest parts.
7. If you cannot make a right turn without entering another traffic lane, you should:
swing wide to the left before starting the turn.
turn wide as you complete the turn.
turn wide before you start the turn.
8. The trailer hand valve should:
never be used for parking.
never be used to test the trailer brakes.
be used in driving.
9. When you back under a trailer:
back the tractor slowly.
use lowest reverse gear.
All of the above.
10. If your trucks has a high center of gravity, which of the following is true for curves?
You should travel at the posted speed limit.
You should slow down, as your truck can roll over at the posted speed limit for the curve.
Reduce your speed to a crawl.
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VT CDL Doubles Triples Test

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