Disaster preparedness is a core competency for all nurses. NCLEX-PN tests triage concepts, the nurse's role in mass casualty incidents (MCIs), emergency command structures, and decontamination procedures. Types of disasters: - Natural: earthquakes, hurricanes, floods, tornadoes - Human-made: industrial accidents, terrorism, mass shootings - Biological: epidemic outbreaks, bioterrorism - Chemical/radiological: HAZMAT spills, nuclear events Mass Casualty Incident (MCI): When the number of patients exceeds normal care capacity — requires triage-based resource allocation. On the exam, writers often pair stable-sounding options with unstable data—notice the mismatch before you commit. If the stem names a license or role, reread that line; scope errors are classic trap answers even when the clinical topic is familiar. Run a 60-second scan: breathing work and oxygenation, perfusion and end organs, neuro baseline, likely infection sources, and devices that can fail quietly. When two answers feel partly right, pick the one that reduces imminent harm and matches orders for the role you were given. Train yourself to state the primary risk in one short phrase before you read the options so distractors do not rewrite your priority...