In vehicle operation, how can a driver effectively use engine braking (travão de motor) on steep descents?
Answer and explanation
Correct answer: B. By shifting to a lower gear to let engine compression control speed
- Step 1: Engine braking. Step 2. Engaging a lower gear uses engine internal resistance to hold back the vehicle, preventing wheel brake overheating.
Practise more Active Safety, Braking Dynamics, Weather Hazards, and Human Factors.
Free questions with an explanation for every one, and full timed Exame de Código (Driving Theory Test) - Portugal mock tests.
More Active Safety, Braking Dynamics, Weather Hazards, and Human Factors questions
- In road safety physics, what components make up the total stopping distance of a moving vehicle?
- In driver psychology, what is the average reaction time of a healthy alert driver in an unexpected emergency?
- In vehicle dynamics, if a vehicle doubles its speed from 50 km/h to 100 km/h, by what factor does braking distance increase?
- In road safety, how does traveling speed affect the distance covered during a driver's reaction time?
- In defensive driving, what is the recommended minimum following safety distance on dry roads in good weather?
- In adverse weather conditions, how should a driver adjust following safety distance when traveling on wet asphalt in rain?