What action should be taken to secure the vehicle when pumping?

Securing the vehicle when pumping is crucial for ensuring the safety of the crew, the equipment, and the scene. Chocking the wheels serves as an additional safety measure to prevent any unintended movement, especially on inclines or uneven surfaces. This practice is particularly important when the vehicle is in use, as the weight of the truck and the pressure from the apparatus can shift its balance.

Chocking the wheels provides a physical barrier that helps to stabilize the vehicle, augmenting the effect of the emergency brake. This is especially true in scenarios where the vehicle may be pumping water or other fluids, which can create vibrations and potentially compromise stability. Therefore, chocking the wheels is not only a prudent measure but also a recommended procedure in the field to maintain a safe environment while operations are underway.

While engaging the emergency brake, turning off the engine, and deploying stabilizing outriggers each play roles in vehicle safety, chocking the wheels directly addresses the issue of preventing movement during the pumping operation, making it a vital part of securing the vehicle in such situations.