CES Office Ergonomics & Computer Workstations 1 — Questions and Answers
Question 1: What is the recommended distance between the user's eyes and a computer monitor?
- 10–20 inches
- 20–40 inches (Correct answer)
- 40–60 inches
- 60–80 inches
Correct answer: 20–40 inches
An arm's length distance of approximately 20–40 inches (50–100 cm) reduces eye strain and allows comfortable focal adjustment.
Question 2: Where should the top of a computer monitor be positioned relative to eye level?
- 10 inches above eye level
- At or slightly below eye level (Correct answer)
- At chin level
- 10 inches below eye level
Correct answer: At or slightly below eye level
Placing the monitor top at or slightly below eye level allows the eyes to gaze slightly downward, reducing neck extension and eye fatigue.
Question 3: The recommended elbow angle when typing at a keyboard is approximately:
- 45°
- 70°
- 90–110° (Correct answer)
- 130°
Correct answer: 90–110°
Elbows bent at 90–110° with upper arms close to the body and wrists neutral minimizes static shoulder and forearm loading.
Question 4: Which keyboard feature is most effective at reducing ulnar deviation during typing?
- Mechanical switches
- Negative tilt (front raised)
- Split ergonomic design (Correct answer)
- Numeric keypad on the right
Correct answer: Split ergonomic design
Split keyboards angle each half outward, allowing the wrists to remain in a more neutral alignment and reducing ulnar deviation.
Question 5: What is the primary ergonomic benefit of a document holder placed next to a monitor?
- Reduces screen glare
- Minimizes neck rotation and repetitive head movement (Correct answer)
- Increases typing speed
- Improves lighting balance
Correct answer: Minimizes neck rotation and repetitive head movement
A document holder positioned adjacent to the monitor at the same height and distance prevents repetitive neck rotation between paper and screen.
Question 6: Keyboard trays that slope negatively (front edge higher than back) are intended to promote:
- Wrist extension
- Wrist flexion
- Neutral to slight wrist extension (Correct answer)
- Ulnar deviation
Correct answer: Neutral to slight wrist extension
A negative tilt positions the keyboard so fingers reach forward and slightly downward, promoting a neutral or mildly extended wrist aligned with the forearm.
CES Office Ergonomics & Computer Workstations 1
What is the recommended distance between the user's eyes and a computer monitor?