AEP Biomechanics and Anthropometry 2

Question 1

Which type of anthropometric data accounts for the range of body positions and movements that occur during actual work tasks?

Accepted Answer

Functional (dynamic) anthropometry

Answer

Functional or dynamic anthropometry measures body dimensions during movement and task performance, capturing the actual reach envelopes and postural variations encountered in real work conditions.

Question 2

In a static biomechanical model, the sum of moments about a joint in equilibrium must equal:

Accepted Answer

Zero

Answer

In static equilibrium, the algebraic sum of all moments (torques) about any joint must equal zero, a fundamental principle used to solve for unknown muscle and joint forces.

Question 3

Which muscle group serves as the primary antagonist to back extensor muscles during loaded forward flexion?

Accepted Answer

Abdominal muscles (rectus abdominis and obliques)

Answer

The abdominal muscles create an opposing moment that helps control forward flexion and contribute to intra-abdominal pressure, reducing the load on lumbar extensors during lifting.

Question 4

The 95th percentile male value means that:

Accepted Answer

95% of males fall below this measurement

Answer

A 95th percentile value means that 95% of the reference population (in this case, males) have a measurement at or below that value, while only 5% exceed it.

Question 5

Static strength is best described as:

Accepted Answer

The maximum force sustained against a fixed, immovable resistance over a brief period

Answer

Static (isometric) strength is the maximum force a person can exert against a fixed resistance over a brief, standardized time period, commonly used in job demands analysis.

(AEP) Associate Ergonomics Professional Practice Test

(AEP) Associate Ergonomics Professional Practice Test

AEP Biomechanics and Anthropometry 2