What is the "crack-the-whip" effect in doubles and triples combinations?

a.The front trailer fishtails causing a jackknife

b.The last trailer amplifies the movement of the tractors steering input

c.The tractor pulls away from the trailers

d.The converter dolly disconnects from the trailer

Explanation

The crack-the-whip effect occurs when steering movements by the driver are amplified in each successive trailer, causing the last trailer to experience the most exaggerated movement. This is especially dangerous during quick lane changes.

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Related Questions

In a triple trailer combination, how much more can the last trailer swing compared to the first trailer during a sudden lane change?When coupling twin trailers, which trailer should be positioned closest to the tractor?Converter dollies built after March 1, 1998 are required to have what safety feature?Where is the ABS malfunction lamp located on a converter dolly built after March 1, 1998?What is the term for the phenomenon where the last trailer in a combination vehicle swings out more than the front trailer during sudden steering movements?

About the CDL Exam

The CDL (Commercial Driver License) exam tests your knowledge of commercial driving rules, safety procedures, and vehicle operation. You must score 80% or higher to pass the written knowledge test. The exam covers general knowledge, air brakes, combination vehicles, and various endorsements.

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