Ergonomic Tools, Equipment & Technology Flashcards
6 cards from real CES practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Ergonomic Tools, Equipment & Technology flashcards as text
Which tool is used to measure joint angles during ergonomic posture assessments?
Answer: Goniometer
A goniometer measures the angle of a joint in degrees, allowing ergonomists to quantify posture deviations during task observations.
Wearable inertial measurement units (IMUs) in ergonomic assessments primarily measure:
Answer: Segment orientation and movement kinematics
IMUs contain accelerometers and gyroscopes that track body segment orientation and movement, enabling continuous posture monitoring without a lab.
Surface electromyography (sEMG) is used in ergonomics primarily to assess:
Answer: Muscle activation and fatigue
sEMG records electrical signals from contracting muscles, allowing ergonomists to quantify muscle load, identify overactivation, and monitor fatigue development.
A force plate is most useful in an ergonomic evaluation for assessing:
Answer: Ground reaction forces and weight distribution during standing or lifting
Force plates measure the vertical, horizontal, and shear forces exerted through the feet, providing data on balance, weight shift, and postural loading.
Sit-stand workstations are most beneficial when they are used:
Answer: With alternating sitting and standing throughout the day (e.g., 30-min intervals)
Alternating between sitting and standing at approximately 30-minute intervals prevents prolonged static loading in either posture and improves circulation.
Which characteristic of a powered tool most reduces ergonomic risk compared to a manual version?
Answer: Elimination of repetitive forceful exertions
Powered tools replace repetitive high-force exertions with a motorized mechanism, directly reducing cumulative tendon and muscle loading.