CEA Workplace Ergonomic 2

Question 1

When evaluating a seated workstation, what is the recommended elbow angle for keyboard use?

Accepted Answer

90–110 degrees

Answer

Elbows should be bent at 90–110 degrees to keep forearms roughly parallel to the floor and minimize shoulder strain.

Question 2

A worker reports wrist pain after prolonged mouse use. Which intervention addresses the root cause most directly?

Accepted Answer

Reposition the mouse closer to the body midline

Answer

Repositioning the mouse closer to the body's midline reduces ulnar deviation and shoulder abduction, addressing the biomechanical root cause.

Question 3

Which lighting metric is most relevant for reducing glare on a computer monitor?

Accepted Answer

Luminance ratio between the screen and surroundings

Answer

Controlling the luminance ratio between the screen and surrounding surfaces minimizes glare discomfort and visual fatigue.

Question 4

Under NIOSH lifting guidelines, what happens to the Recommended Weight Limit (RWL) when the horizontal distance from the load to the spine increases?

Accepted Answer

RWL decreases

Answer

Greater horizontal distance increases the moment arm on the spine, so the Horizontal Multiplier decreases and the RWL decreases accordingly.

Question 5

Which of the following best describes the purpose of a task rotation program in ergonomics?

Accepted Answer

Reduce cumulative exposure to specific ergonomic stressors

Answer

Task rotation distributes ergonomic stressors across different muscle groups and joints to reduce cumulative loading and injury risk.

(CEA) Certified Ergonomics Associate Practice Test