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CM13.1-5 | Disaster Management — Practice Quiz
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The United Nations defines a disaster as a serious disruption of the functioning of a community or society that exceeds its capacity to cope using its own resources. Which of the following best reflects the ESSENTIAL element of this definition?
Correct. The critical element in the UN definition is that the disruption exceeds local coping capacity — this is what distinguishes a disaster from an ordinary emergency. Neither causation (natural vs man-made) nor a death threshold is part of the definition.
The UN/WHO definition of disaster centres on three elements: (1) serious disruption of community/society functioning, (2) human, material, economic, or environmental losses, and (3) exceeding the community's own coping capacity. All three must be present; the cause (natural vs man-made) is irrelevant to classification.
The defining criterion is the coping-capacity threshold, not the cause of the event. A man-made event such as the Bhopal gas tragedy is equally a disaster. There is no universal death-count threshold in the UN definition.
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A district health officer is planning community-level disaster risk reduction activities BEFORE a disaster occurs. Which phase of the disaster management cycle does this activity fall under?
Correct. Activities that build capacity BEFORE a disaster — community training, stockpiling, evacuation drills, early warning systems — belong to the Preparedness phase. This is distinct from Mitigation (reducing risk of the hazard) and from Response/Recovery (post-event).
The disaster management cycle has four main phases: Mitigation → Preparedness → Response → Recovery. Preparedness includes planning, training, stockpiling, and drills done BEFORE a disaster. Mitigation involves measures that reduce the probability or impact of a hazard (e.g., flood embankments). Response is the immediate post-impact phase; Recovery is the medium-to-long-term restoration phase.
Pre-event capacity-building activities belong to the Preparedness phase, not to Response (immediate post-event actions) or Recovery (restoration after the event).
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After a severe flood, the state government constructs embankments and elevates the floor level of schools in flood-prone areas. This activity most accurately belongs to which phase of the disaster management cycle?
Correct. Mitigation refers to structural and non-structural measures that reduce the severity of a disaster's impact. Flood embankments and elevated-floor construction directly reduce flood damage — this is classic structural mitigation.
Mitigation = reducing the probability or severity of a disaster's impact (e.g., earthquake-resistant buildings, flood embankments, cyclone shelters). Preparedness = building response capacity before a disaster (e.g., early warning systems, stockpiling, drills). The key distinction: mitigation modifies the hazard or vulnerability; preparedness modifies the capacity to respond.
Mitigation (not Preparedness) involves measures that reduce the hazard or its impact. Preparedness is about readiness capacity; mitigation is about reducing risk.
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The National Disaster Management Authority (NDMA) was established under which legislation?
Correct. The Disaster Management Act of 2005 established the NDMA and the three-tier structure (National–State–District) for disaster management in India. It was enacted in response to the inadequate institutional response to the 2004 Indian Ocean tsunami.
The DM Act 2005 created: (1) NDMA at the national level, chaired by the Prime Minister; (2) State Disaster Management Authority (SDMA), chaired by the Chief Minister; (3) District Disaster Management Authority (DDMA), chaired by the District Collector. This three-tier structure ensures coordinated response from national to local level.
The NDMA was established by the Disaster Management Act of 2005. The Civil Defence Act (1968) and National Security Act (1980) address different domains.
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Who serves as the ex-officio Chairperson of the National Disaster Management Authority (NDMA) under the Disaster Management Act, 2005?
Correct. Under Section 3 of the DM Act 2005, the Prime Minister is the ex-officio Chairperson of the NDMA. This reflects the national priority given to disaster management.
NDMA hierarchy: PM as Chairperson → Vice-Chairperson (Cabinet rank) → up to 9 members. SDMA: Chief Minister as Chairperson. DDMA: District Magistrate/Collector as Chairperson. Knowing the chairperson at each level is a frequently tested fact.
The NDMA is chaired by the Prime Minister (not the Home Minister). The State DMA is chaired by the Chief Minister; the District DMA by the District Collector.
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In the START (Simple Triage and Rapid Treatment) system, a casualty who has respiratory rate >30/min, absent radial pulse, and is unable to follow commands would be assigned which triage colour?
Correct. In START triage: respiratory rate >30/min or <10/min (abnormal breathing) + absent radial pulse (poor perfusion) + inability to follow commands (altered consciousness) → all three parameters abnormal → RED (Immediate). This casualty needs immediate life-saving intervention.
START triage algorithm: Step 1 — Breathing? No → open airway → still no breathing → BLACK. Breathing → Step 2 — Respiratory rate: <10 or >30 → RED. 10-30 → Step 3 — Radial pulse: absent → RED. Present → Step 4 — Mental status: unable to follow simple commands → RED. Able to follow → YELLOW. Walking wounded → GREEN.
Abnormal respiration + absent radial pulse + inability to follow commands = all three START parameters abnormal → RED (Immediate), not Black. Black is reserved for those with no spontaneous breathing even after airway opening.
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After a building collapse in Surat, a rescue worker finds a 35-year-old man sitting upright, holding his fractured forearm, breathing at 18/min, with a strong radial pulse, and able to state his name and address clearly. Under the START system, this casualty should be tagged:
Correct. Respiratory rate 18/min (normal 10-30), strong radial pulse (normal perfusion), able to follow commands (normal mental status) — but with a significant injury (fracture forearm). In START, a non-walking casualty with all three vital parameters normal = YELLOW (Delayed). He is not walking wounded (cannot walk safely with a fracture under disaster conditions), so he is not GREEN.
The Green (Minor) category in START is specifically for walking wounded — casualties who can walk to a treatment area independently. Non-ambulatory casualties with all normal vital parameters are tagged Yellow (Delayed). This distinction is clinically important: YELLOW patients need definitive care but can safely wait; GREEN patients are truly ambulatory and self-directing.
This casualty has normal respiratory rate, normal perfusion, and normal mental status, but is NOT walking — therefore YELLOW, not GREEN. GREEN is reserved for walking wounded.
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Which principle of the Incident Command System (ICS) ensures that no single supervisor manages more than 7 subordinates in a disaster response operation?
Correct. Span of control in ICS limits the number of subordinates a single supervisor manages to 3-7 (optimal 5). This prevents communication breakdown and maintains accountability during the chaos of disaster response.
Key ICS principles: (1) Unity of Command — each responder reports to exactly ONE supervisor. (2) Span of Control — 3 to 7 subordinates per supervisor (optimal 5). (3) Modular Organisation — ICS expands/contracts based on incident needs. (4) Common Terminology — standardised language across agencies. (5) Incident Action Plans — all operations guided by a written or verbal IAP.
Span of control governs the supervisor-subordinate ratio. Unity of command means each responder reports to ONE supervisor (prevents conflicting orders). Both are ICS principles but address different aspects of organisational structure.
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A chemical tanker accident occurs on an industrial highway near Pune. Emergency responders set up a decontamination corridor. Which of the following correctly describes the zone where DECONTAMINATION activities should be performed?
Correct. In HAZMAT/chemical incident management, three zones are established: Hot (contaminated, restricted entry, PPE required), Warm (decontamination activities happen here, limited PPE), and Cold (clean support zone — command post, ambulances, hospital liaison). Decontamination occurs in the WARM zone before casualties enter the clean zone.
HAZMAT zone structure: Hot Zone = contaminated area, entry with full PPE only, rescue of casualties; Warm Zone = decontamination corridor, remove clothing (removes ~80% contamination), gross decontamination with water; Cold Zone = clean area, casualty treatment area, command post, media. 'Purple zone' is not a recognised HAZMAT zone designation.
The Warm zone (not Hot, not Cold) is where decontamination occurs. The Hot zone is the contaminated area with active chemical hazard. The Cold zone is the fully clean support area — uncontaminated casualties reach here only AFTER decontamination.
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During a mass casualty simulation exercise at a district hospital in Rajasthan, a medical student evaluates a victim who is breathing at 28/min, has an absent radial pulse, and is unable to follow verbal commands. The student tags the victim as YELLOW (Delayed). What type of triage error has occurred, and what is its consequence?
Correct. This casualty should be RED (Immediate): breathing rate 28/min (within 10-30 range, so acceptable), absent radial pulse (abnormal → RED), unable to follow commands (abnormal → RED). Two of the three START parameters are critically abnormal. Tagging as YELLOW means this casualty will not receive immediate life-saving intervention — this is UNDERTRIAGE, the most dangerous triage error.
Undertriage = assigning a lower triage category than warranted (e.g., RED tagged as YELLOW). Consequence: the casualty waits for care and may die from a preventable condition. Overtriage = assigning a higher category than warranted (e.g., YELLOW tagged as RED). Consequence: resource wastage on non-critical patients. In mass casualty management, undertriage is considered the more dangerous error because it has direct mortality consequences.
Undertriage (not overtriage) occurred. The absent radial pulse and inability to follow commands each independently require a RED tag in the START system. YELLOW classification would delay potentially life-saving haemorrhage control.
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