CDL · Doubles and triples
You are pulling doubles and the trailer wheels begin to skid. What is the most likely result?
Correct answer: The combination could jackknife.
Answer options
- AThe combination could jackknife. Correct
- BThe trailers will line up behind the tractor on their own.
- CThe rig will go straight ahead regardless of how you steer.
Why
When the trailer wheels lose their grip, the trailer can swing out to the side and fold the rig into a jackknife. Check your mirrors often so you notice a trailer skid early; once the trailer slides completely out of your lane, you may be unable to recover.
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
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- If you pull doubles or triples, which of the following is accurate?
- While you are pulling doubles, the wheels of one trailer lock up and start to skid. What is the most likely result?
- When you pull doubles or triples, why is it important to look farther ahead than usual?
- If a set of doubles includes only a single 28.5-foot pup trailer, what is that configuration called?
- 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?
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