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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 inspecting the coupling, how much space should there be between the upper and the lower fifth-wheel?
It depends on the load
It depends on the trailer
½ inch
2. You should flash your brake lights to warn drivers behind you when:
you see you'll need to slow down.
you see a hazard that will require slowing down.
you see a bus stops in the roadway ahead to unload passengers.
All of the above.
3. If you are caught in strong winds, you should:
keep a strong grip on the steering wheel and slow down or pull off the roadway.
immediately take your foot off the accelerator.
speed up while keeping a strong grip on the steering wheel.
None of the above.
4. Hanging meat in a refrigerated truck can be:
a very stable load with a low center of gravity.
a very stable load if properly distributed.
a very unstable load with a low center of gravity.
a very unstable load with a high center of gravity.
5. To know how much space you should keep in front of you when driving at speeds below 40 mph, one good rule says you need at least ______ for each ______ of vehicle length.
3 seconds; 50 feet
1 second; 5 feet
2 seconds; 10 feet
1 second; 10 feet
6. To prevent rollover, you should do all of the following except:
put the lightest parts of the cargo under the heaviest parts.
keep the load centered on your rig.
avoid quick lane changes.
drive slowly around turns.
7. Having ABS on only the trailer:
makes the trailer more likely to roll over.
makes the trailer more likely to swing out.
still gives you more control over your vehicle during braking.
is very dangerous.
8. Hanging meat in a refrigerated truck:
creates a low center of gravity.
can be a very unstable load.
will not affect safe driving ability.
should never be transported.
9. Off-tracking is:
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.
when a vehicle towing a trailer skids, and the trailer pushes the towing vehicle from behind until it spins the vehicle around.
when the tires lose their contact with the road and have little or no traction.
None of the above.
10. When possible, you should park:
on the shoulder.
so you will be able to pull forward when you leave.
on the roadway.
so you will have to back up when you leave.
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NY CDL Doubles Triples Test

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