🔗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.
Alabama CDL Combination Vehicles 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 Combination Vehicles Practice Questions
- Glad hands are usually connecting which of these?
- Why should you lock the tractor glad hands to each other (or dummy couplers) when you are not towing a trailer?
- After connecting the air lines but before backing under the trailer you should:
- Sudden turns or aggressive braking will have the greatest effect on which trailer?
- Which task is NOT performed during the tractor protection valve test?