CPE Anthropometry & Physical Dimensions in Ergonomics

Question 1

When designing workstations to accommodate the widest practical range of users, which percentile range is the ergonomic design standard?

Accepted Answer

5th to 95th percentile

Answer

1st to 99th percentile

Answer

10th to 90th percentile

Answer

25th to 75th percentile

Question 2

Which anthropometric measurement is most critical for determining appropriate seated workstation surface height?

Accepted Answer

Popliteal height

Answer

Standing stature

Answer

Sitting eye height

Answer

Shoulder height seated

Question 3

When designing a fixed overhead clearance (e.g., a doorway or ceiling-mounted obstacle), ergonomic guidelines recommend designing for which user group?

Accepted Answer

95th percentile male stature

Answer

Average user (50th percentile combined)

Answer

5th percentile female stature

Answer

Mean of male and female 50th percentiles

Question 4

Functional reach differs from structural (static) reach in that functional reach:

Accepted Answer

Includes trunk rotation and shoulder movement during the reach

Answer

Measures arm length with the elbow locked and shoulder fixed

Answer

Is always shorter than structural reach by a fixed percentage

Answer

Is measured with both arms extended overhead simultaneously

Question 5

The 'secular trend' in anthropometry refers to which phenomenon?

Accepted Answer

The gradual increase in average human body size across successive generations

Answer

Seasonal variation in body dimensions due to temperature

Answer

Measurement variability caused by time-of-day effects on stature

Answer

Stature reduction due to spinal compression with aging

Question 6

The ANSUR II database is valued by ergonomists primarily because it provides:

Accepted Answer

Comprehensive US Army anthropometric data with over 100 measurements per participant

Answer

ISO-standardized civilian workplace anthropometric norms

Answer

WHO pediatric growth and developmental measurement standards

Answer

OSHA-mandated minimum anthropometric accommodation thresholds

Question 7

When a single fixed workstation dimension cannot accommodate both a 5th percentile female and a 95th percentile male user, the preferred ergonomic design approach is:

Accepted Answer

Design for adjustability across the required range

Answer

Design for the 50th percentile average user

Answer

Design for the smallest user only to minimize reach distances

Answer

Design for the largest user only to maximize clearance