CEA Manual Material Handling 2

Question 1

Which NIOSH equation variable accounts for the horizontal distance of the load from the worker's body at the origin of lift?

Accepted Answer

Horizontal multiplier (HM)

Answer

The horizontal multiplier (HM) penalizes lifts where the load is far from the body, reducing the recommended weight limit.

Question 2

A worker lifts a box from floor to shelf height repeatedly. Which body region is at highest risk for musculoskeletal injury during this task?

Accepted Answer

Lumbar spine

Answer

Floor-to-shelf lifts impose maximum compressive and shear forces on lumbar discs, making the lower back the highest-risk region.

Question 3

What does the Lifting Index (LI) value of 1.0 indicate under the NIOSH lifting equation?

Accepted Answer

The task is at the upper boundary of acceptable risk

Answer

An LI of 1.0 means the actual load equals the recommended weight limit, representing the boundary of nominal risk.

Question 4

Which pushing/pulling metric is considered the most reliable predictor of musculoskeletal disorder risk?

Accepted Answer

Peak force at initiation

Answer

Peak initial force required to break static friction is the best predictor because it represents maximum musculoskeletal loading during push/pull tasks.

Question 5

According to ergonomics guidelines, what is the recommended maximum weight for a one-handed carry by an average male worker under ideal conditions?

Accepted Answer

22 lbs

Answer

22 lbs (10 kg) is the commonly cited guideline for one-handed carrying to minimize asymmetric spinal loading.

(CEA) Certified Ergonomics Associate Practice Test

(CEA) Certified Ergonomics Associate Practice Test

CEA Manual Material Handling 2