Final answer:
During peacetime, it is recommended to check your protective mask before each use or at least once a month.
Step-by-step explanation:
During peacetime, it is recommended to check your protective mask before each use or at least once a month. Regular inspections are important to ensure that the mask is in good condition, fits properly, and the filters are clean.
This helps to maintain the effectiveness of the mask in protecting against pollutants or pathogens.