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CDL DOUBLES PRACTICE TEST DELAWARE

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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 Delaware doubles triples test consists of 20 questions. To pass, you must correctly answer at least 16 questions (80%). The DE CDL doubles triples test covers the following sections of the Delaware CDL Manual: Driving Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Combination Vehicles, Doubles and Triples. Take this DE CDL practice test now to prepare for the actual test!
1. To prevent rollover, you should do all of the following except:
drive slowly around turns.
put the lightest parts of the cargo under the heaviest parts.
keep the load centered on your rig.
avoid quick lane changes.
2. Which of the following road surfaces freezes first?
Bridges
Parkings
Underpasses
Open roads
3. If the low air pressure warning light comes on, you should:
continue to drive normally.
stop immediately.
call for help.
set the parking brake.
4. You should NOT use the parking brakes if:
the brakes are too dry.
the brakes are cold.
the brakes are very hot.
All of the above.
5. Why should you cover your cargo?
Because spill protection is a safety requirement in many states.
To protect people from spilled cargo.
To protect the cargo from weather.
All of the above.
6. When connecting to the rear trailer, the trailer height should be:
lower than the center of the fifth-wheel.
the same height as the fifth-wheel.
higher than the center of the fifth-wheel.
None of the above.
7. When the spring brakes are on, you should:
not push the brake pedal down.
pump the brakes.
exceed the posted speed limit.
press the accelerator.
8. Combination vehicles usually require _________ single commercial vehicles.
less driving skill than
the same level of skill as
more driving skill than
None of the above.
9. When driving at night you should dim your lights when following another vehicle within:
500 feet.
100 feet.
50 feet.
1 mile.
10. Which of the following is not a type of retarder?
Exhaust
Hydraulic
Electric
Pressure
 
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DE 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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