Which of the following conditions could cause a loss of control of a mobile water supply (MWS) apparatus?

A liquid surge within the water tank can indeed lead to a loss of control of a mobile water supply apparatus. This phenomenon occurs when the water inside the tank shifts due to changes in speed, acceleration, or braking. When the vehicle accelerates, the water moves toward the back of the tank, and during braking, it rushes forward. This movement creates momentum that can affect the vehicle's stability, making it more difficult for the driver to maintain control. Such dynamic forces can lead to swaying, tipping, or even losing traction, especially if the tank is not properly baffled or if the water levels are not managed effectively. Therefore, understanding and managing the risks associated with liquid surge is crucial for safe operation of a mobile water supply apparatus.