North Carolina Doubles and Triples CDL Practice Test
The Doubles/Triples endorsement is required to operate commercial vehicles pulling two or three trailers. This endorsement covers coupling procedures, inspection techniques, and the unique handling characteristics of multiple trailers.
Questions
20
Passing Score
80%
Time Limit
No time limit specified
Prerequisites
Valid CDL license required - can be added to any CDL class
What is the Doubles and Triples Endorsement?
The Doubles/Triples endorsement is required to operate commercial vehicles pulling two or three trailers. This endorsement covers coupling procedures, inspection techniques, and the unique handling characteristics of multiple trailers.
State regulations vary - some states restrict or prohibit triples
Topic Breakdown
Coupling and Uncoupling
~8 questions
- Proper coupling procedures
- Air line connections
- Safety chain attachments
Inspection Procedures
~6 questions
- Multi-trailer inspection techniques
- Converter dolly checks
- Air brake system inspection
Driving Techniques
~4 questions
- Backing and turning procedures
- Space management
- Speed and following distance
Safety Considerations
~2 questions
- Rollover prevention
- Emergency procedures
Study Tips for North Carolina
- 1Know length limits: doubles 28 feet per trailer, triples 28.5 feet total
- 2Learn the converter dolly: connects rear trailer, has its own landing gear
- 3Master the rearward amplification: rear trailer swings wider than front trailer
- 4Remember braking distances: doubles/triples need much more stopping distance
- 5Understand backing prohibition: never back up doubles/triples - very dangerous
North Carolina CDL Information
Age Requirements
Intrastate: 18+ · Interstate: 21+
CDL Renewal
Every 5 years
ELDT Required
Yes — ELDT (Entry-Level Driver Training) from FMCSA-registered provider
North Carolina Division of Motor Vehicles (NCDMV)
Official CDL Portal →Career Opportunities
Frequently Asked Questions
You need this endorsement to drive commercial vehicles pulling two or three trailers, subject to state highway regulations.
Other North Carolina CDL Tests
Ready to Pass Your North Carolina Doubles/Triples Test?
Practice with real exam questions and detailed explanations.