Workplace Ergonomic 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 Workplace Ergonomic flashcards as text
When evaluating a seated workstation, what is the recommended elbow angle for keyboard use?
Answer: 90–110 degrees
Elbows should be bent at 90–110 degrees to keep forearms roughly parallel to the floor and minimize shoulder strain.
A worker reports wrist pain after prolonged mouse use. Which intervention addresses the root cause most directly?
Answer: Reposition the mouse closer to the body midline
Repositioning the mouse closer to the body's midline reduces ulnar deviation and shoulder abduction, addressing the biomechanical root cause.
Which lighting metric is most relevant for reducing glare on a computer monitor?
Answer: Luminance ratio between the screen and surroundings
Controlling the luminance ratio between the screen and surrounding surfaces minimizes glare discomfort and visual fatigue.
Under NIOSH lifting guidelines, what happens to the Recommended Weight Limit (RWL) when the horizontal distance from the load to the spine increases?
Answer: RWL decreases
Greater horizontal distance increases the moment arm on the spine, so the Horizontal Multiplier decreases and the RWL decreases accordingly.
Which of the following best describes the purpose of a task rotation program in ergonomics?
Answer: Reduce cumulative exposure to specific ergonomic stressors
Task rotation distributes ergonomic stressors across different muscle groups and joints to reduce cumulative loading and injury risk.
A standing workstation is set too high for an assembly worker. What is the most likely musculoskeletal consequence?
Answer: Shoulder elevation and trapezius muscle overload
When a workstation is too high, workers must elevate their shoulders to reach the surface, leading to sustained trapezius muscle loading.
In the context of ergonomic risk assessment, what does the RULA tool primarily evaluate?
Answer: Upper limb postures, muscle use, and force in seated or light work
RULA (Rapid Upper Limb Assessment) scores upper limb postures, muscle use, and external forces to estimate musculoskeletal risk.