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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 Georgia doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The GA CDL doubles triples test covers the following sections of the Georgia CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this GA CDL practice test now to prepare for the actual test!
1. Front-end header boards:
should never be used.
protect drivers from cargo in case of an accident or emergency stop.
protect drivers from spilled cargo.
reduce traction.
2. Which of the the following statements about fatigue is true?
Fatigue impairs your vision and judgment.
Fatigued driving is one of the leading causes of accidents.
Fatigue may cause you to not see and react to hazards.
All of the above.
3. Which of these is more likely to rollover due to the "crack-the-whip" effect?
The last trailer of doubles
5-axle tractor semitrailers
The front trailer of 65 ft. conventional doubles
The last trailer of triples
4. When driving a 50-foot truck at 40 mph, your minimum following distance should be:
8 seconds
4 seconds
6 seconds
5 seconds
5. If a load is 10 feet long, the minimum number of tie-downs required is:
6. Air tank drains:
should not be used in wet weather.
are used to remove water and oil from the air tanks.
protect the tanks and the rest of the system from too much pressure.
are used to move air to the brakes.
7. When driving, you should check mirrors regularly to know where other vehicles are around you. Remember that:
every registered motor vehicle must have at least one mirror.
convex mirrors make things look larger and closer than they really are.
you should check your after the start of any trip to make sure they are properly adjusted.
there are blind spots that your mirrors cannot show you.
8. The tractor protection valve:
supplies air to the trailer air tanks.
keeps air in the tractor brake system should the trailer break away or develop a bad leak.
works the trailer brakes.
controls the emergency brakes on combination vehicles.
9. To test your parking brake, do the following:
Speed up to 5 mph, then set the parking brake.
Set the parking brake while going downhill.
Speed up to 15 mph, then set the parking brake.
Set the parking brake, and gently pull against it in a low gear.
10. Rollovers happen when drivers:
turn too fast.
turn too slowly.
stop too often.
brake too hard.
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GA CDL Doubles Triples Test

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