Why is it required to drive in low gear on a steep descent?
- To save fuel and to reduce engine wear.
- Correct answer: To use the engines compression in order to maintain a slow and constant driving speed without overusing the brakes.
- To prevent tire wear.
- To prevent overheating of the vehicle’s engine.
Why this is the answer
The correct answer in the official bank: To use the engines compression in order to maintain a slow and constant driving speed without overusing the brakes.
In a low gear, the engine's compression slows the vehicle (engine braking) and helps keep a slow, steady speed on the descent. This means you don't have to ride the brakes constantly, which can overheat them and cause brake fade or failure. The purpose is safe speed control, not saving fuel or protecting the tyres or engine.