JIBC Hazard, Risk, Vulnerability Analysis 2 — Questions and Answers
Question 1: In the context of emergency management, which formula best represents the relationship between hazard, vulnerability, and risk?
- Risk = Hazard × Vulnerability (Correct answer)
- Risk = Hazard + Vulnerability
- Risk = Hazard / Vulnerability
- Risk = Vulnerability - Hazard
Correct answer: Risk = Hazard × Vulnerability
Risk is calculated as the product of hazard (likelihood and severity) multiplied by vulnerability (susceptibility of the exposed element).
Question 2: A 'probabilistic hazard assessment' differs from a 'deterministic hazard assessment' primarily because it:
- Identifies the worst-case scenario only
- Assigns likelihoods to multiple possible outcomes (Correct answer)
- Focuses solely on historical events
- Eliminates uncertainty from the analysis
Correct answer: Assigns likelihoods to multiple possible outcomes
Probabilistic assessments quantify the likelihood of various hazard scenarios occurring, whereas deterministic assessments evaluate a single defined scenario.
Question 3: Which of the following best describes 'cascading hazards'?
- Hazards that only affect remote regions
- A primary event that triggers secondary and tertiary hazardous events (Correct answer)
- Hazards that decrease in severity over time
- Multiple unrelated hazards occurring simultaneously
Correct answer: A primary event that triggers secondary and tertiary hazardous events
Cascading hazards occur when a primary event (e.g., earthquake) triggers subsequent events (e.g., tsunami, landslide) that compound overall impact.
Question 4: When conducting a community vulnerability assessment, 'physical vulnerability' refers to:
- Psychological trauma experienced by residents
- The susceptibility of built structures and infrastructure to damage (Correct answer)
- Economic losses from business interruption
- Social inequality within the community
Correct answer: The susceptibility of built structures and infrastructure to damage
Physical vulnerability addresses how susceptible buildings, roads, utilities, and infrastructure are to damage from a given hazard.
Question 5: The Hyogo Framework for Action (2005–2015) emphasized which core priority for disaster risk reduction?
- Rebuilding infrastructure after disasters
- Ensuring disaster risk reduction is a national and local priority with a strong institutional basis (Correct answer)
- Eliminating all natural hazards
- Transferring disaster costs to insurance markets
Correct answer: Ensuring disaster risk reduction is a national and local priority with a strong institutional basis
The Hyogo Framework's first priority was ensuring that disaster risk reduction becomes a national and local priority with a strong institutional basis for implementation.
Question 6: Which indicator would MOST directly measure 'social vulnerability' in a hazard analysis?
- Distance of buildings from a fault line
- Percentage of population with limited English proficiency (Correct answer)
- Annual precipitation levels
- Soil liquefaction potential
Correct answer: Percentage of population with limited English proficiency
Limited English proficiency is a social vulnerability indicator because it affects a population's ability to receive warnings, access resources, and recover from disasters.
Question 7: A 'hazard profile' typically includes which of the following components?
- Only the geographic extent of the hazard
- Frequency, magnitude, duration, speed of onset, and spatial extent (Correct answer)
- Insurance cost estimates only
- The names of responsible government agencies
Correct answer: Frequency, magnitude, duration, speed of onset, and spatial extent
A hazard profile characterizes a hazard by its frequency, magnitude, duration, speed of onset, and spatial extent to inform risk analysis.
