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Double/Triple Endorsement Test #1 | North Carolina 2026 #1

North Carolina CDL Practice Examination (Based on the 2026 NC CDL handbook)

Practice for the North Carolina CDL Doubles/Triples (T) endorsement. Covers coupling, uncoupling, and safe operation of double and triple trailers.

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Questions
20
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1. When coupling twin trailers, which trailer should be positioned closest to the tractor?

2. Converter dollies built after March 1, 1998 are required to have what safety feature?

3. Where is the ABS malfunction lamp located on a converter dolly built after March 1, 1998?

4. What is the term for the phenomenon where the last trailer in a combination vehicle swings out more than the front trailer during sudden steering movements?

5. In a triple trailer combination, how much more can the last trailer swing compared to the first trailer during a sudden lane change?

6. What is the "crack-the-whip" effect in doubles and triples combinations?

7. When inspecting a converter dolly, you should verify that the pintle hook is locked by doing what?

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