Risk Assessment & Hazard Control Flashcards

Which risk assessment methodology assigns numerical scores to likelihood and severity to produce a risk priority number (RPN)?

Answer: Failure Mode and Effects Analysis (FMEA)

FMEA calculates an RPN by multiplying severity, occurrence, and detectability scores to prioritize corrective actions.

Under OSHA's hierarchy of controls, substitution is defined as:

Answer: Replacing a hazardous substance with a less hazardous one

Substitution involves replacing a hazardous material, process, or equipment with a safer alternative.

A 'residual risk' is best described as:

Answer: The risk remaining after all controls have been implemented

Residual risk is the level of risk that persists even after all feasible control measures have been put in place.

Which document is used during a Job Hazard Analysis to record each task step, associated hazards, and recommended controls?

Answer: JHA worksheet

A JHA worksheet systematically breaks a job into steps, identifies hazards at each step, and documents preventive measures.

The 'bowtie' risk model visually represents:

Answer: Causes on the left, the top event in the center, and consequences on the right

The bowtie model places the hazardous event in the center, with threats/causes branching left and consequences branching right.

When conducting a quantitative risk assessment, the probability of an event is typically expressed as:

Answer: A frequency per unit time (e.g., events per year)

Quantitative risk assessment uses statistical frequencies (e.g., failures per year) rather than subjective descriptors.

Which chemical hazard control involves enclosing a process to prevent worker exposure to airborne contaminants?

Answer: Complete enclosure

Complete enclosure contains the hazardous process within a sealed system, preventing contaminants from entering the work environment.