Ergonomic Design & Intervention Strategies Flashcards
7 cards from real CEA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Ergonomic Design & Intervention Strategies flashcards as text
Which hierarchy of controls level provides the greatest long-term effectiveness in ergonomic intervention?
Answer: Elimination
Elimination removes the hazard entirely and is the most effective level in the hierarchy of controls.
A workstation redesign reduces a worker's required reach distance from 26 inches to 16 inches. This is an example of which intervention type?
Answer: Engineering control
Modifying the physical workstation layout to reduce reach distance is an engineering control.
When applying the NIOSH Lifting Equation, what does the Recommended Weight Limit (RWL) represent?
Answer: The weight a healthy worker can lift without injury risk over a shift
The RWL is the weight that nearly all healthy workers can lift repeatedly over an 8-hour shift without increased injury risk.
A job rotation program is introduced to alternate workers between high-force and low-force tasks. Which limitation is most important to consider?
Answer: Workers may still be exposed to cumulative loading if rotated tasks use the same muscle groups
If rotated tasks engage the same muscle groups, cumulative loading and fatigue may persist despite the change in activity.
Which seated workstation dimension adjustment would most directly reduce lumbar compression forces?
Answer: Providing adjustable lumbar support
Adjustable lumbar support maintains the natural lordotic curve, reducing spinal compressive forces during prolonged sitting.
The Strain Index (SI) tool is primarily designed to assess risk associated with:
Answer: Distal upper extremity disorders
The Strain Index evaluates six task variables to estimate risk of distal upper extremity (wrist, hand, forearm) disorders.
During a participatory ergonomics program, why is worker involvement considered essential?
Answer: Workers possess firsthand knowledge of task demands that analysts may miss
Workers performing the tasks daily have practical insights into hazards, variability, and feasibility of solutions that outside analysts often overlook.