Ohio Doubles and Triples CDL Practice Test
Practice with real OH Doubles/Triples exam questions and detailed explanations. Rated 4.8 stars by 1,000+ drivers.
Written by CDL holders and exam prep experts · Updated April 2026
Free Questions
10
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
Free Practice Questions
10 questionsQuestion 1 of 10
Converter dollies:
Browse Ohio Doubles/Triples Questions
- 1. Converter dollies:
- 2. Which trailer is most affected by the crack-the-whip, resulting in a rollover?
- 3. You should check trailer height before connecting a converted dolly to a second or third trailer. The trailer height is right when:
- 4. Before you can supply air to the air tanks of a second trailer you need to:
- 5. When driving a truck with more than one trailer, which trailer should be first behind the truck?
- 6. Which of these statements about the handling of doubles and triples is true?
- 7. During inspection, the converter dolly air tanks drain valve should be _____ and the pintle hook should be _____.
- 8. You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking you should:
- 9. How many axles may be found on a converter dolly?
- 10. With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. When you do this, you should hear:
Study Tips for Ohio
- 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
Ohio CDL Information
Age Requirements
Intrastate: 18+ · Interstate: 21+
CDL Renewal
Every 4 years
ELDT Required
Yes — ELDT (Entry-Level Driver Training) from FMCSA-registered provider
Ohio Bureau of Motor Vehicles (BMV)
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.
Doubles/Triples Study Resources
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