CIH Ergonomics and Biomechanics 2

Question 1

Which of the following best describes the 'neutral posture' in ergonomics?

Accepted Answer

Joints held at their mid-range positions minimizing tissue stress

Answer

Neutral posture keeps joints near mid-range, reducing loading on muscles, tendons, and ligaments.

Question 2

The NIOSH Lifting Equation Recommended Weight Limit (RWL) is calculated from the load constant of 51 lbs multiplied by how many task-specific multipliers?

Accepted Answer

6

Answer

The RWL uses six multipliers: horizontal, vertical, distance, asymmetry, frequency, and coupling.

Question 3

A worker reports numbness and tingling in the thumb, index, and middle fingers. Which nerve is most likely compressed?

Accepted Answer

Median nerve

Answer

The median nerve passes through the carpal tunnel and innervates the thumb, index, and middle fingers.

Question 4

What does the term 'coupling' refer to in the context of the NIOSH Lifting Equation?

Accepted Answer

Quality of the hand-to-object interface

Answer

Coupling describes how well a worker can grip the load, ranging from good (handles) to poor (no grip points).

Question 5

Which anthropometric measurement is most critical when designing a seated workstation keyboard height?

Accepted Answer

Elbow height while seated

Answer

Seated elbow height determines the optimal keyboard height to maintain neutral wrist and shoulder posture.

CIH - Certified Industrial Hygienist Exam Practice Test

CIH - Certified Industrial Hygienist Exam Practice Test

CIH Ergonomics and Biomechanics 2