In which type of seal check would you place your hands over the cartridge intakes and inhale gently?

In a negative-pressure test, the procedure involves placing your hands over the cartridge intakes of a respirator and inhaling gently. This action creates a slight vacuum, allowing the user to feel if the respirator is forming a proper seal against the face. If the respirator pulls in tightly and there are no air leaks, it indicates that the seal is adequate and the respirator can effectively filter air.

This test is critical for ensuring safety, especially when working with hazardous materials, as any breach in the seal could lead to exposure to harmful substances. Conducting a negative-pressure test before entering a hazardous environment is a vital practice in personal protective equipment (PPE) protocols.