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

Normative anthropometry

Answer

Static anthropometry

Answer

Comparative anthropometry

Question 2

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

Accepted Answer

Zero

Answer

The body weight of the worker

Answer

The compressive force on the spine

Answer

The gravitational constant times mass

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

Quadriceps

Answer

Gluteus maximus

Answer

Hamstrings

Question 4

The 95th percentile male value means that:

Accepted Answer

95% of males fall below this measurement

Answer

5% of males are taller than average

Answer

The measurement exceeds the 95th percentile female value

Answer

Only 5% of males can safely perform the task

Question 5

Static strength is best described as:

Accepted Answer

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

Answer

The maximum force exerted during a rapid, single movement

Answer

The endurance capacity of a muscle group over extended repetitions

Answer

The force generated during an isokinetic contraction

Question 6

When performing an ergonomic assessment that requires comparison of worker dimensions to a workstation, which data source is most appropriate for a US adult workforce?

Accepted Answer

All of the above are valid US adult anthropometric data sources

Answer

ANSUR II (Army Anthropometric Survey)

Answer

NHANES (National Health and Nutrition Examination Survey)

Answer

Civilian American and European Surface Anthropometry Resource (CAESAR)

Question 7

Intra-abdominal pressure (IAP) during lifting is believed to contribute to spinal stability primarily by:

Accepted Answer

Creating an extension moment that partially offloads the erector spinae

Answer

Compressing the lumbar vertebrae together for rigidity

Answer

Increasing intervertebral disc height to reduce shear

Answer

Activating the multifidus to directly oppose compressive forces