What is the first action to do in MOPP-4?

What is the first action to do in MOPP-4?

• A. Stop breathing and DAWN MASK (and secure hood)
• B. Don hood
• C. Check air supply
• D. Proceed to TP zone

Answer: (A)

In MOPP-4, protecting the airway immediately is the top priority. The first action is to momentarily stop breathing and quickly don the DAWN mask while securing the hood. The mask provides the primary barrier against inhaled agents, and the hood ensures a complete seal for skin and eyes. Only after the mask and hood are in place should you check air supply if using a powered system, and then move to the TP zone as directed. Donning the hood alone doesn’t protect the lungs, and trying to check air supply before masking leaves you exposed. That’s why stopping breathing and putting on the mask with the hood is the best initial action.

In MOPP-4, protecting the airway immediately is the top priority. The first action is to momentarily stop breathing and quickly don the DAWN mask while securing the hood. The mask provides the primary barrier against inhaled agents, and the hood ensures a complete seal for skin and eyes. Only after the mask and hood are in place should you check air supply if using a powered system, and then move to the TP zone as directed. Donning the hood alone doesn’t protect the lungs, and trying to check air supply before masking leaves you exposed. That’s why stopping breathing and putting on the mask with the hood is the best initial action.