How do you clear a field protective mask properly?

To properly clear a field protective mask, covering the outlet valve and exhaling is the correct method. This technique involves sealing the mask to ensure that the exhaled air does not escape through the mask. By exhaling forcefully while covering the outlet valve, the mask becomes pressurized slightly, which helps to push out any contaminants or fog that may have accumulated inside the mask. This is essential for maintaining visibility and ensuring that the mask functions effectively. Maintaining a proper seal while performing this action is crucial for maximum safety and efficiency.

Other options, such as removing the mask entirely or shaking it vigorously, would not effectively accomplish the goal of clearing the mask. Shaking or improperly using the mask could also lead to contamination or compromise its protective qualities. Additionally, inhaling deeply before exhaling does not assist in clearing any potential fog or debris effectively, and the mask would not be cleaned as intended.