Which gear should be used when descending a steep hill in a vehicle?

Using low gear when descending a steep hill is essential for maintaining control of the vehicle. In low gear, the engine provides greater resistance against the vehicle’s weight, which helps to slow down the descent and reduces the reliance on the brakes. This is particularly important because prolonged braking can cause brake overheating and reduce their effectiveness.

When in low gear, the vehicle's speed is naturally limited, which prevents it from gaining too much momentum. This allows for safer handling and a greater ability to steer the vehicle in case of any obstacles or changes in the road conditions. Overall, low gear aids in managing steep inclines and enhances safety while driving on grades.

The other options like high gear, reverse gear, or drive gear do not offer the same level of control and could lead to excessive speed or loss of steering control, making them less suitable for steep descents.