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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 New York doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The NY CDL doubles triples test covers the following sections of the New York CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this NY CDL practice test now to prepare for the actual test!
1. When backing, you should:
back and turn toward the right side whenever possible.
back quickly.
only use mirror on the driver's side.
use the mirrors on both sides.
2. Longer combination vehicles have the tendency to swing wide on turns. This is called:
3. Air tanks usually hold enough compressed air to allow the brakes to be used _________ even if the compressor stops working.
for 3 days
for one stop
several times
for one day
4. For a cargo fire in a box trailer, you should:
open the doors immediately and use the fire extinguisher.
use the fire extinguisher on the doors.
keep the doors shut.
wait 10 minutes before opening the doors.
5. If you unlock the pintle hook with the dolly still under the rear trailer:
your vehicle might roll away.
steam and boiling water can spray under pressure.
the dolly tow bar may fly up.
the brakes could be damaged by the combined forces of the springs and the air pressure.
6. Doubles and triples:
have a lower chance of skidding.
can't be turned suddenly.
can be stopped suddenly due to their weight.
can be turned suddently due to the low center of gravity.
7. If there is a fire and you are not sure what to use to put it out, you should:
use dry powder.
use water.
use a fire extinguisher.
wait for firefighters.
8. Your vehicle has hydraulic brakes. When you press the brake pedal while driving and the pedal goes to the floor, remember that:
pumping the brake pedal may generate enough hydraulic pressure to stop the vehicle.
the parking brake should never used to slow the vehicle.
shifting into neutral may help slow the vehicle.
All of the above.
9. ABS helps you:
decrease your overall stopping distance.
keep the wheels from locking up.
decrease your average speed.
lock your wheels.
10. Doubles/triples are:
easier to drive than other CMVs.
usually faster than most CMVs.
less stable than other CMVs.
more stable than other CMVs.
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NY 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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