CDL · Doubles and triples
How does the rollover risk of doubles and triples compare with that of single-trailer rigs?
Correct answer: They tip over more easily.
Answer options
- AThey tip over more easily. Correct
- BThey tip over less easily.
- CThey tip over just as easily.
Why
The crack-the-whip effect makes doubles and triples less stable than single-trailer combinations, so they overturn more readily. The farther back a trailer sits in the set, the greater its rollover risk.
About this question
Topic: Doubles and triples License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
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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
- Pulling a set of doubles, you have to brake hard to keep from hitting something. Which braking method should you use?
- What kind of parking space is best for a set of doubles or triples?
- A truck pulling double trailers is 100 feet long and moving at 30 mph. The pavement is dry and you can see well. At minimum, how many seconds of following space should you leave?
- Which unit is most likely to roll over because of the crack-the-whip effect?
- When you pull doubles or triples, why is it important to look farther ahead than usual?
- Your 100-foot double-trailer rig is traveling 50 mph on a dry road and visibility is good. What is the smallest following gap, in seconds, you should leave behind the vehicle ahead?
- If you pull doubles or triples, which of the following is accurate?
- To begin training as a triple-trailer driver, federal rules say you must first have:
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