Musculoskeletal Disorder Prevention 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 Musculoskeletal Disorder Prevention flashcards as text
Which factor is NOT included as a multiplier in the Revised NIOSH Lifting Equation (RNLE)?
Answer: Worker Age Multiplier (WAM)
The RNLE includes multipliers for horizontal distance, vertical height, distance traveled, asymmetry, frequency, and coupling quality — but NOT worker age.
A data entry clerk develops pain and stiffness in the neck and upper trapezius after several months on a new workstation. The MOST likely ergonomic root cause is:
Answer: Monitor positioned too low requiring sustained neck flexion
A monitor positioned too low forces sustained neck flexion, increasing static loading on cervical muscles and the upper trapezius, leading to neck and shoulder MSDs.
What is the primary biomechanical reason that grip force increases MSD risk at the wrist and forearm?
Answer: High grip force increases tendon tension and compressive forces on wrist structures
Forceful gripping increases tension in finger flexor tendons that pass through the carpal tunnel and elevates compressive forces on wrist joints, raising MSD risk.
Which of the following describes 'cumulative trauma disorder (CTD)' most accurately?
Answer: A condition caused by the accumulation of micro-traumas from repeated occupational exposures over time
CTDs develop gradually from repeated sub-threshold exposures that cause micro-damage faster than tissue can repair, eventually manifesting as clinically significant disorders.
A production line requires workers to assemble small components with a pinch grip 800 times per hour. Which engineering control would BEST reduce MSD risk?
Answer: Redesigning the components or fixtures to allow a power grip instead of a pinch grip
Pinch grip generates up to 5 times more tendon and joint force than a power grip for equivalent effort; redesigning to allow a power grip is the most effective engineering solution.
When evaluating awkward postures using the RULA (Rapid Upper Limb Assessment) tool, a score of 7 indicates:
Answer: Investigate and implement changes immediately
In RULA, a grand score of 7 represents the highest action level, indicating unacceptable risk that requires immediate investigation and implementation of changes.
Which condition involves inflammation of the tendon sheath and is characterized by a 'trigger' or locking sensation in the finger?
Answer: Stenosing tenosynovitis (trigger finger)
Stenosing tenosynovitis (trigger finger) involves thickening of the tendon sheath causing the tendon to catch or lock as it glides, producing the characteristic triggering sensation.