CPE Workplace Design & Modifications 5

Question 1

When designing for whole-body vibration (WBV) exposure in vehicle operators, which axis of vibration is weighted most heavily in ISO 2631-1 because of its greatest health risk?

Accepted Answer

Vertical (z-axis)

Answer

ISO 2631-1 applies the highest weighting factor to the vertical (z-axis) because the spine is most susceptible to compressive and shear forces in that direction.

Question 2

An ergonomics team is redesigning a checkout lane to reduce cashier injuries. Which workstation feature MOST directly reduces trunk twisting during item scanning?

Accepted Answer

Placing the scanner centrally between the conveyor and bagging area

Answer

Centering the scanner between the conveyor and bagging area reduces the rotational arc the cashier must perform during each scanning cycle.

Question 3

Which of the following best describes macroergonomics as applied to workplace design?

Accepted Answer

A sociotechnical approach that considers organizational systems, work processes, and culture alongside physical workstation design

Answer

Macroergonomics addresses the organizational and sociotechnical system level, integrating work processes, management structures, and culture with physical design.

Question 4

A factory installs a new overhead conveyor that causes workers to sustain shoulder abduction above 60° for extended periods. Which health outcome is MOST associated with this exposure?

Accepted Answer

Rotator cuff tendinopathy

Answer

Sustained shoulder abduction above 60° compresses the supraspinatus tendon under the acromion, leading to rotator cuff tendinopathy over time.

Question 5

When evaluating the ergonomic impact of a newly modified workstation, which method provides the MOST objective measure of physical workload change?

Accepted Answer

Surface electromyography (sEMG) comparing muscle activation before and after the modification

Answer

Surface EMG directly quantifies muscle activation levels, providing an objective physiological measure of physical workload changes attributable to the workstation modification.

(CPE) Certified Professional Ergonomist Practice Test

(CPE) Certified Professional Ergonomist Practice Test

CPE Workplace Design & Modifications 5