CIEE Manual Material Handling Assessment 3

Question 1

Which tissue is most commonly injured during repetitive manual material handling tasks involving awkward trunk flexion?

Accepted Answer

Intervertebral disc

Answer

Repeated trunk flexion combined with compression forces accelerates intervertebral disc degeneration, the most prevalent injury in manual handling workers.

Question 2

The Liberty Mutual Manual Materials Handling Tables define task acceptability in terms of the percentage of what population that can perform the task?

Accepted Answer

Percentage of the male or female workforce capable of exerting the required force

Answer

The Snook and Ciriello (Liberty Mutual) tables express acceptable limits as percentages of male or female worker populations who can perform tasks without unacceptable strain.

Question 3

When evaluating a carrying task using the NIOSH approach, which condition makes carrying assessment significantly different from a standard lift assessment?

Accepted Answer

The horizontal and vertical distances change continuously throughout the carry

Answer

During carrying, the load position relative to the body changes with each step, making it difficult to identify a single set of NIOSH multipliers for the entire task.

Question 4

A worker carries 15 kg boxes a horizontal distance of 8 meters at a frequency of 4 lifts per minute over an 8-hour shift. Which risk factor is MOST concerning from an MMH perspective?

Accepted Answer

The combination of carrying distance and high frequency increases cumulative spinal loading

Answer

Long carry distances combined with high frequency dramatically increase cumulative metabolic and lumbar loading, even when individual load weight appears moderate.

Question 5

Which biomechanical model is most commonly used in ergonomic software (e.g., 3DSSPP) to quantify lumbar compressive forces during manual handling tasks?

Accepted Answer

Three-dimensional static strength prediction (3D SSP) model

Answer

3DSSPP uses a three-dimensional static strength prediction model to estimate joint reaction forces, including lumbar L4/L5 compression, for a given posture and external load.

(CIEE) Certified Industrial Ergonomic Evaluator Practice Test

(CIEE) Certified Industrial Ergonomic Evaluator Practice Test

CIEE Manual Material Handling Assessment 3