CHMM Risk Assessment and Hazard Analysis Flashcards

In quantitative risk assessment, risk is defined as the combination of which two factors?

Answer: Probability and consequence (severity)

Risk is calculated as the product of the probability (likelihood) of an adverse event and the consequence (severity) of that event.

Which hazard analysis technique uses a systematic, inductive approach with a structured worksheet to identify deviations from design intent using guide words like 'more,' 'less,' and 'no'?

Answer: HAZOP Study

HAZOP (Hazard and Operability Study) uses guide words applied to process parameters to systematically identify potential deviations and their consequences.

A Preliminary Hazard Analysis (PHA) is typically conducted at which stage of a project?

Answer: Early in the conceptual or design phase

PHA is an early-stage analysis performed during conceptual design to identify hazards before detailed design decisions are locked in.

In an environmental health risk assessment, what is the step that determines how much of a chemical people are actually exposed to?

Answer: Exposure assessment

Exposure assessment quantifies the magnitude, frequency, and duration of human contact with a hazardous substance through all relevant pathways.

Which term describes the concentration of a chemical in air at which 50% of a test animal population dies within a specified time period?

Answer: LC50

LC50 (Lethal Concentration 50) is the airborne concentration of a substance lethal to 50% of a test population, used to compare acute inhalation toxicity.

The process of identifying what can go wrong, how likely it is, and what the consequences are is the definition of which activity?

Answer: Risk assessment

Risk assessment is the structured process of identifying hazards, estimating likelihood and consequences, and characterizing overall risk.