Which of these statements about quick steering movements and doubles/triples is true?
Answer: A
Doubles/triples turn over from quick steering moves more easily than many vehicles.
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.
All choices
- ADoubles/triples turn over from quick steering moves more easily than many vehicles.
- BCounter steering is easier with doubles/triples than most other vehicles.
- CYou should apply the brakes at the same time as quick steering movements.
CDL Doubles/Triples Test Info
Questions on Exam
20
Passing Score
80%
Time Limit
Typically 30 minutes; varies by testing location
The Doubles/Triples test content is federally standardized, so this question applies in every state. Age limits, fees, and testing procedures do vary — check your state's CDL requirements.
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More CDL Doubles/Triples Practice Questions
- With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the trailer. When you do this, you should hear:
- The purpose of a converter dolly is to:
- Converter dollies:
- The converter dolly air tank drain valve on coupled double/triple trailers should be:
- Crack-the-whip effect occurs when: