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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 Pennsylvania doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The PA CDL doubles triples test covers the following sections of the Pennsylvania CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this PA CDL practice test now to prepare for the actual test!
1. If you must make an emergency stop, you should:
brake in a way that will keep your vehicle in a straight line.
apply the brakes as hard as you can to lock them.
use the hand brake before the brake pedal.
None of the above.
2. The average driver has a reaction time of:
1/8 of a second.
1/32 of a second.
3/4 second to 1 second.
1/16 of a second.
3. When going down a steep downgrade, you should primarily brake using:
the service brakes.
the braking effect of the engine.
the emergency brake.
the parking brake.
4. _________ rigs are much more likely to roll over in an accident than _________ rigs.
Fully loaded ; empty
Empty ; overloaded
Fully loaded ; overloaded
Empty ; fully loaded
5. It is safer to drive over (rather than to avoid) which of the following?
Paper and cloth sacks
Plastic containers
Cardboard boxes
None of the above.
6. What is the most important reason to inspect your vehicle?
Saving money by preventing costly repairs.
Vehicle inspection is required by federal and state laws.
Achieving the best gas mileage.
Your safety and that of other road users.
7. Who is responsible for inspecting the cargo?
The motor carrier
The driver
The person who loaded and secured the cargo
The shipper
8. On dry pavement, the braking distance when travelling at 55 mph is about:
61 feet.
142 feet.
216 feet.
419 feet.
9. If you cannot make a right turn without entering another traffic lane, you should:
watch out for vehicles coming toward you and back up for them.
turn wide as you complete the turn.
turn wide before you start the turn.
swing wide to the left before starting the turn.
10. You are more at risk of being fatigued:
when stopping periodically during long trips.
after getting more than 8 hours of sleep.
when driving during the day.
when driving alone.
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PA 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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