Stab braking should not be used on vehicles with:
Answer: C
Anti-lock brakes.
Antilock brake systems (ABS) prevent wheels from locking up during braking. Therefore, stab braking cannot be used on a tractor-trailer that is equipped with ABS.
All choices
- AHazardous materials.
- BTrailers.
- CAnti-lock brakes.
Why the other answers are wrong
A. Hazardous materials.
Stab braking is not prohibited specifically because of hazardous materials but due to the presence of ABS.
B. Trailers.
Stab braking can be used on vehicles with trailers unless they have ABS.
CDL General Knowledge Test Info
Questions on Exam
50
Passing Score
80%
Time Limit
Typically 60 minutes; varies by testing location
The General Knowledge 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.
Ready to pass your CDL General Knowledge exam?
Get full practice exams, study mode, and simulated tests with detailed explanations.
Risk-free — cancel anytime, no charge until trial ends.
More CDL General Knowledge Practice Questions
- Hydroplaning:
- You are driving a 40-foot vehicle at 55 mph. The road is dry, and visibility is good.What is the least amount of space that you need to have in front of your vehicle?
- How many hours may a CMV driver be on duty within a seven-day period?
- To prevent a load from shifting, there should be at least one tie down for every ____ feet of cargo.
- The tread depth on front steering wheel tires should be: