Oklahoma Doubles and Triples CDL Practice Test
Practice with real OK 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
Typically 30 minutes; varies by testing location
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
During inspection, the converter dolly air tanks drain valve should be _____ and the pintle hook should be _____.
Browse Oklahoma Doubles/Triples Questions
- 1. During inspection, the converter dolly air tanks drain valve should be _____ and the pintle hook should be _____.
- 2. Which of these statements about the handling of doubles and triples is true?
- 3. The purpose of a converter dolly is to:
- 4. Which of these statements about quick steering movements and doubles/triples is true?
- 5. How are the spring brakes for a converter dolly released?
- 6. Crack-the-whip effect occurs when:
- 7. Which statement is true regarding the coupling of a triple?
- 8. To check if the converter dolly is securely coupled to the rear trailer you should:
- 9. You are doing a walk around inspection of a double or triple trailer rig. You should be sure the converter dolly air tank drain values are ____ and the pintle hook is ____.
- 10. Which trailer is most affected by the crack-the-whip, resulting in a rollover?
Study Tips for Oklahoma
- 1Master coupling and uncoupling procedures
- 2Understand the crack-the-whip effect
- 3Practice backing maneuvers mentally
- 4Know increased stopping distances
- 5Check state regulations for triples restrictions
Oklahoma 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
Oklahoma DPS
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
Be Ready for Your Oklahoma Doubles/Triples Test
1,000+ drivers passed their CDL exam using CDL Answers.
Real questions. Detailed explanations. Know your score before test day.