In which situations should an aerial apparatus be driven in low gear?

Driving an aerial apparatus in low gear is particularly important when climbing a hill. This choice is correct because low gear provides greater power and torque, allowing the vehicle to ascend steep inclines more effectively without straining the engine. By using low gear, the vehicle can maintain a steady speed and better control, reducing the risk of stalling and ensuring that the weight of the apparatus is managed properly on an incline.

In contrast, while heavy rain may require careful driving, it does not specifically necessitate low gear; the focus should be on maintaining traction and control rather than on gear selection alone. Descending steep roads is also a scenario where low gear could be important for controlling speed, but it applies more broadly to maintaining control by using engine braking rather than the typical use when ascending. Driving on straight roads typically allows for the use of higher gears, which are more fuel-efficient and appropriate for maintaining higher speeds without the need for increased power.