CIRS Ergonomics & Work Conditioning Flashcards
6 cards from real CIRS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CIRS Ergonomics & Work Conditioning flashcards as text
What is the primary purpose of a job site analysis performed by a CIRS professional?
Answer: To systematically identify the physical demands, hazards, and environmental conditions of a specific job
A job site analysis evaluates the physical, environmental, and cognitive demands of a specific job to enable accurate matching of worker capabilities with job requirements for safe return to work.
Which anthropometric principle is most critical when designing ergonomic workstations for diverse workforces?
Answer: Adjustability to accommodate the range from the 5th to 95th percentile of worker body dimensions
Ergonomic workstations must be adjustable to accommodate the 5th through 95th percentile of worker body dimensions, since designing only for the 'average' worker fails most of the workforce.
Cumulative trauma disorders (CTDs) in industrial workers are primarily caused by:
Answer: Repeated microtraumas from sustained or repetitive workplace activities that exceed the body's recovery capacity
CTDs develop from accumulated microtraumas over time when repetitive or sustained activities produce tissue damage faster than the body can repair it, leading to progressive injury.
What does 'neutral posture' mean in the context of ergonomic workstation design?
Answer: Body alignment that minimizes musculoskeletal stress by keeping joints near their mid-range of motion
Neutral posture refers to natural alignment of body segments that minimizes strain on muscles, tendons, and joints by maintaining them near their biomechanically efficient mid-range positions.
In a work hardening program, simulated work activities should most importantly:
Answer: Closely replicate the actual physical demands of the target job to ensure functional readiness
Effective work hardening uses work simulation tasks that closely match actual job demands so that the skills and tolerances developed transfer directly to real-world work performance.
What does a Lifting Index (LI) value above 1.0 in the NIOSH equation indicate?
Answer: The lifting task poses an increased risk of musculoskeletal injury and ergonomic intervention may be needed
An LI greater than 1.0 means the load exceeds the Recommended Weight Limit, indicating increased musculoskeletal injury risk and the need for ergonomic redesign or administrative controls.