COLORADO CDL DOUBLES TRIPLES PRACTICE TEST

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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 Colorado doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The CO CDL doubles triples test covers the following sections of the Colorado CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this CO CDL practice test now to prepare for the actual test! Important: Triple trailers are not legal in Colorado.
1. Which of the following vehicles is most likely to turn over?
3 axle tractor semitrailer
65 ft. conventional double
Triple trailer
5 axle tractor semitrailer
2. Texting is:
the most dangerous distraction.
safer than talking on a cell phone.
safer thanĀ  engaging in conversation with a passenger.
about as safe as adjusting the radio.
3. 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 high center of gravity.
a very unstable load with a low center of gravity.
4. No matter how small the cargo is, it should have at least:
2 tie-downs.
6 tie-downs.
4 tie-downs.
1 tie-down.
5. Blocking is used to:
protect the cargo from weather.
protect people from spilled cargo.
keep the cargo from sliding.
All of the above.
6. When you discover a fire, if the trailer doors are hot you should not open them because:
you should use the fire extinguisher on the door.
opening the doors lets air in and may make the fire flare up.
the temperature of the trailer should not be changed in any way.
with air many fires do less damage.
7. Which of the following is not a type of retarder?
Pressure
Electric
Hydraulic
Exhaust
8. If the air compressor is belt-driven, you should check the air compressor drive belt before each trip. The belt should be:
tight.
worn.
cracked.
loose.
9. Which of the following will NOT help you prevent rollover?
Using the controlled braking method.
Keeping the cargo as close to the ground as possible.
Driving slowly around turns.
All of the above.
10. ABS:
improves your visibility at night.
does not decrease your stopping distance.
helps you increase your average speed.
helps you increase your following distance.
 
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Doubles Triples CO CDL Test

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