CDL · Combination vehicles
You are pulling a tank trailer when the tractor's drive wheels lock up. What could happen?
Correct answer: The tractor and trailer could jackknife.
Answer options
- AThe tractor and trailer could jackknife Correct
- BThe rig would stop in a shorter, straighter line
- CThe trailer would keep tracking straight behind the tractor
Why
Drive wheels normally lock because the driver brakes too hard. Once they slide, the trailer can push the tractor out of line, and the combination can fold into a jackknife within seconds.
About this question
Topic: Combination vehicles License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
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This question is part of Driving a Tractor-Trailer (14 questions). Take the full set and check your score.
Practice Driving a Tractor-TrailerMore questions from Driving a Tractor-Trailer
- Which statement best describes off-tracking?
- While backing a trailer, you notice it starting to stray from the path you want. What should you do right away?
- Which of these does NOT lower the risk of a rollover?
- What should you do when the wheels of your trailer begin to skid?
- If your trailer starts to skid, what is the most reliable way to notice it early?
- Locked trailer wheels can make a trailer slide out and swing to the side. Under which load condition is this most likely?
- When it comes to stopping trucks, which statement is accurate?
- A combination-vehicle driver wants to reduce the chance of a rollover. Which loading practice helps?
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