Q1. During overhaul at a New Jersey residential fire, firefighters detect hidden fire extension inside wall cavities. What is the recommended procedure according to NJ fire department standards to ensure complete extinguishment?

• ○Use thermal imaging cameras to locate hotspots and open walls carefully to extinguish hidden fire.
• ○Apply water from exterior hose lines without opening walls to avoid structural damage.
• ○Seal off the area and monitor for smoke without further opening walls to prevent collapse.
• ○Wait for the structure to cool naturally before conducting any overhaul operations.