Ergonomics and Human Factors Flashcards

Which risk factor is most commonly associated with the development of work-related musculoskeletal disorders (WMSDs)?

Answer: Repetitive motion, forceful exertion, and awkward postures

Repetition, force, and awkward posture are the primary ergonomic risk factors that contribute to musculoskeletal disorders such as carpal tunnel syndrome and tendinitis.

What ergonomic tool does NIOSH provide to assess manual material handling tasks and determine a recommended weight limit (RWL)?

Answer: The NIOSH Lifting Equation

The revised NIOSH Lifting Equation calculates a Recommended Weight Limit and Lifting Index to evaluate two-handed manual lifting tasks.

What does a Lifting Index (LI) greater than 1.0 indicate when using the NIOSH Lifting Equation?

Answer: The task poses an increased risk of low back injury for some workers

An LI > 1.0 means the load exceeds the recommended weight limit, indicating elevated musculoskeletal injury risk that warrants job redesign.

Which type of vibration is associated with Raynaud's phenomenon (vibration white finger) in workers?

Answer: Hand-arm vibration (HAV)

Hand-arm vibration from power tools causes vibration-induced white finger (VWF) by damaging peripheral blood vessels and nerves in the hands.

In ergonomic workstation design, what is the recommended monitor height to reduce neck strain?

Answer: Monitor top at eye level or slightly below

The top of the monitor screen should be at or slightly below eye level so the user maintains a neutral head and neck posture while working.

What is the primary goal of participatory ergonomics programs?

Answer: To involve employees in identifying hazards and designing ergonomic solutions

Participatory ergonomics engages workers who perform the tasks in hazard identification and solution development, improving both effectiveness and acceptance of changes.