🔗Alabama Combination Vehicles — Question 7 of 10

The crack-the-whip effect is related to:

Answer: B

The susceptibility of the last trailer of a combination vehicle to rollover due to magnifying any vehicle movement.

The crack-the-whip effect is related to the tendency of the last (or third) trailer of a combination vehicle to rollover the easiest because steering and braking movements are magnified further back on the vehicle.

Source: Alabama CDL Manual

All choices

AThe amount of off-tracking exhibited by the last trailer of a combination vehicle.
BThe susceptibility of the last trailer of a combination vehicle to rollover due to magnifying any vehicle movement.
CSkidding that is started in the front trailer being transferred to the rear trailer.

Why the other answers are wrong

A. The amount of off-tracking exhibited by the last trailer of a combination vehicle.

Off-tracking refers to the path of trailer wheels, not the rollover tendency caused by the crack-the-whip effect.

C. Skidding that is started in the front trailer being transferred to the rear trailer.

Skidding transfer is not related to the crack-the-whip effect, which involves rollover risk due to magnified movements.

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Alabama CDL Combination Vehicles Test Info

Questions on Exam

Passing Score

80%

Time Limit

Typically 30 minutes; varies by testing location

Age Requirements

Intrastate: 18+ · Interstate: 21+

Alabama Law Enforcement Agency (ALEA)

Official CDL Portal

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The crack-the-whip effect is related to:

Answer: B

All choices

Why the other answers are wrong

Alabama CDL Combination Vehicles Test Info

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