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.
Source: Alabama CDL Manual
All choices
- AYou making a quick lane change.
- BYou aggressively apply the brakes.
- CFront tire rims crack.
Alabama CDL Doubles/Triples Test Info
Questions on Exam
20
Passing Score
80%
Time Limit
Typically 30 minutes; varies by testing location
Age Requirements
Intrastate: 18+ · Interstate: 21+
Alabama Law Enforcement Agency (ALEA)
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More CDL Doubles/Triples Practice Questions
- The purpose of a converter dolly is to:
- Converter dollies:
- The converter dolly air tank drain valve on coupled double/triple trailers should be:
- Which of these statements about the handling of doubles and triples is true?
- Which trailer is most affected by the crack-the-whip, resulting in a rollover?