Crack-the-whip effect occurs when:
Answer: A
You making a quick lane change.
The crack-the-whip effect refers to the amplification that steering changes make on a vehicle, with longer vehicles having a bigger amplification than shorter ones. A quick change of steering direction can cause the rear trailer to whip and if the center of gravity is high enough, roll the trailer over. This is caused by any quick lane change or jerky movement of the steering wheel.
All choices
- AYou making a quick lane change.
- BYou aggressively apply the brakes.
- CFront tire rims crack.
CDL Doubles/Triples Test Info
Questions on Exam
20
Passing Score
80%
Time Limit
Typically 30 minutes; varies by testing location
The Doubles/Triples test content is federally standardized, so this question applies in every state. Age limits, fees, and testing procedures do vary — check your state's CDL requirements.
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More CDL Doubles/Triples Practice Questions
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