What is the safest position to adopt when filling a spray tank?

Standing with your head above the container and the filling hole represents the safest position when filling a spray tank. This position allows the applicator to maintain visibility of the filling process, ensuring that they can monitor for any spills or overflows that may occur. Additionally, it helps in preventing direct exposure to the chemical while minimizing the risk of accidents that could lead to inhalation or contact with the chemicals being used.

Maintaining this position also allows for better control and handling of the hoses and fittings, ensuring that everything is securely connected before the filling process begins. Safety measures are critical when handling pesticides or chemical solutions, and this position facilitates a more cautious and attentive approach.

Other positions, such as kneeling beside the tank or leaning over it, may compromise the applicator's ability to respond quickly to accidents, while standing below the filling hole may expose them to a greater risk of chemical exposure. Standing above the filling hole can reduce visibility and increase the chance of spills directly affecting the worker. Thus, option B is the most prudent and safety-conscious choice when performing this task.