Skip to main content
Back to Practice Tests
Q

31. What statement best explains 'crack the whip effect'?

Combination Vehiclesmedium
AWhen you make a quick lane change or sudden movement with your steering wheel the rear trailer tends to swing out. The force of the rear trailer becomes amplified causing it to roll over (rearward amplification).
BYour trailer is half full and the cargo is loaded in the front of the trailer. When you make a sudden steering wheel movement cargo will tend to forcefully slide to the back of the trailer, forcing the trailer to rollover.
CWhen you make a quick lane change or sudden movement with your steering wheel the tractor tends to rock and sway. The velocity of the rear most trailer forces the tractor to rollover before the trailer.

Detailed Explanation

The correct answer is "When you make a quick lane change or sudden movement with your steering wheel the rear trailer tends to swing out. The force of the rear trailer becomes amplified causing it to roll over (rearward amplification).". This is based on federal CDL regulations and safety standards.

Correct Answer: When you make a quick lane change or sudden movement with your steering wheel the rear trailer tends to swing out. The force of the rear trailer becomes amplified causing it to roll over (rearward amplification).

Ready to practice for real?

Take our free, full-length Combination Vehicles practice test. Simulates the actual DMV exam with timed questions.

Start Practice Test

Related Questions

69. More than half of truck driver deaths in crashes are the result of rollovers. Trucks turn over easier when fully loaded and are:

combination-vehiclesmedium

27. The fifth wheel locking lever is not locked after the jaws close around the kingpin. This means that:

combination-vehiclesmedium

90. You want to inspect the trailer supports. You should place the tractor transmission in which gear after you have uncoupled the trailer?

combination-vehiclesmedium

62. Off-tracking or cheating causes which of these to follow the wider path while making a turn?

combination-vehiclesmedium

To test the trailer service brakes, you should:

combination-vehiclesmedium