Question 414 of 276 · Alberta Class 4 Knowledge Test
What is the average person's perception time?
Exactly one answer is correct.
You got of questions right. Here on the question pages nobody remembers which ones you got wrong. The trainer saves your progress and asks the mistakes again until they stick.
Or free: the 10 questions most people get wrong
Show solution
Correct answer to question 414
- A: About three-quarters of a second
Explanation
Perception time is how long it takes to see a situation and realize there is a need to stop, about three-quarters of a second for the average person. Less experienced, tired or unwell drivers are often slower.
More questions: Stopping Distance, Mirrors and Fatigue
- 415About how long does it take an air brake system to respond after the driver presses the brake pedal?
- 416Total stopping distance is the sum of which distances?
- 417Compared with a level road at the same speed, how does a downhill grade affect stopping distance?
- 418When is the driver of a taxi exempt from wearing a seat belt?
- 419By how much does wearing a seat belt reduce the chance of being killed or injured in a collision?
- 420How far around the vehicle does the "danger zone" extend?