Office Ergonomics & Computer Use 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 Office Ergonomics & Computer Use flashcards as text
A standing desk user complains of low-back fatigue after 2 hours of standing. Which intervention is most evidence-based?
Answer: Provide an anti-fatigue mat and encourage frequent posture changes
Anti-fatigue mats reduce static muscle loading in the lower extremities and back, and posture variation prevents sustained muscle fatigue.
Which lighting condition is considered the leading environmental cause of computer-related eye strain in offices?
Answer: Glare from windows or overhead fixtures reflecting off screens
Glare—both direct and reflected—forces the visual system to work harder to perceive screen content, causing asthenopia.
According to the 20-20-20 rule for eye fatigue prevention, every 20 minutes a worker should:
Answer: Look at something 20 feet away for 20 seconds
Looking at a distant object (≥20 feet) for 20 seconds relaxes the ciliary muscles that hold the lens in a near-focus state.
In an ergonomic assessment, a worker's chair seat pan is found to be too long (deep). The primary risk this creates is:
Answer: Excess pressure behind the knees, limiting lumbar contact with the backrest
A seat pan that is too deep contacts the back of the knees, forcing the user to sit forward and lose lumbar backrest support.
Which factor most increases the risk of contact stress (pressure on tendons or nerves) during keyboard work?
Answer: Resting wrists on a hard desk edge while typing
Resting wrists on a hard surface while typing compresses the carpal tunnel and ulnar nerve, increasing contact stress risk.
A worker with short stature cannot reach the floor while seated at an adjusted workstation. The correct ergonomic solution is:
Answer: Provide a footrest to support the feet and maintain thigh posture
A footrest supports the feet when the desk height cannot be lowered further, maintaining proper thigh angle and blood flow.
Which ergonomic keyboard feature is specifically designed to reduce forearm pronation during typing?
Answer: Split and tented design
A split and tented keyboard angles the two halves upward in the middle, allowing the forearms to rotate into a more neutral (less pronated) position.