You are driving a vehicle at 55 mph on dry pavement. About how much total stopping distance will you need to bring it to a stop?
Answer: C
The length of a football field.
At 55 mph, your vehicle will travel a minimum of 419 feet.
All choices
- ATwice the length of the vehicle.
- BHalf the length of the football field.
- CThe length of a football field.
Why the other answers are wrong
A. Twice the length of the vehicle.
Choice A is wrong because stopping distance at 55 mph is much longer than twice the vehicle length.
B. Half the length of the football field.
Choice B is wrong because half the length of a football field is less than the actual stopping distance needed at 55 mph.
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
- Which of these pieces of emergency equipment should always be carried in your vehicle?
- When driving at night, you should:
- Which of these statements about cold weather driving is true?
- The purpose of the retarders is to:
- Retarders: