CDL · Doubles and triples
Counting every joint where connected units can pivot, how many articulation points does a standard double-trailer combination have?
Correct answer: Three.
Answer options
- AFour
- BThree Correct
- CTwo
Why
A standard double bends in three places: at the tractor's fifth wheel, at the pintle hook joining the first trailer to the converter dolly, and at the dolly's fifth wheel beneath the second trailer.
About this question
Topic: Doubles and triples License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
Practice the whole set
This question is part of Pulling Doubles and Triples (24 questions). Take the full set and check your score.
Practice Pulling Doubles and TriplesMore questions from Pulling Doubles and Triples
- Compared with driving a smaller vehicle, what does pulling doubles or triples require of you?
- A hazard forces you to make an emergency stop while towing double trailers. How should you brake?
- In a B-train (B-double), at how many points can the combination pivot?
- Compared with other kinds of commercial vehicles, how stable are double and triple combinations?
- Which statement about making sudden steering moves with a double or triple trailer combination is accurate?
- During normal driving, which control applies the trailer brakes on a double or triple combination?
- In a set of triples, which position is safest for the lightest trailer?
- Which of these best describes safe driving with doubles or triples?
Practice on your phone.
Practice here in your browser, or use the app with the same questions and explanations. It's free on the App Store.