SSH Ergonomics & Musculoskeletal Disorder Prevention

Question 1

Which of the following is the MOST common work-related musculoskeletal disorder (WMSD) reported in U.S. workplaces?

Accepted Answer

Low back pain

Answer

Low back pain is the most prevalent work-related musculoskeletal disorder, accounting for the greatest number of lost workdays and workers' compensation costs in the U.S.

Question 2

According to NIOSH, which of the following is NOT one of the primary ergonomic risk factors for musculoskeletal disorders?

Accepted Answer

High ambient temperature

Answer

NIOSH identifies repetitive motion, awkward posture, contact stress, forceful exertion, vibration, and static posture as primary ergonomic risk factors; high ambient temperature is a thermal hazard, not a primary MSD risk factor.

Question 3

The Revised NIOSH Lifting Equation recommends a Recommended Weight Limit (RWL) for a two-handed manual lift. What is the load constant (LC) used as the starting point in this equation?

Accepted Answer

23 kg (51 lbs)

Answer

The NIOSH Lifting Equation uses a load constant of 23 kg (51 lbs), which represents the maximum recommended weight under ideal lifting conditions.

Question 4

A Lifting Index (LI) value greater than what threshold indicates a significant risk of musculoskeletal injury according to the NIOSH Lifting Equation?

Accepted Answer

LI > 1.0

Answer

An LI greater than 1.0 indicates that the lifting task exceeds the recommended weight limit, signifying a significant risk of musculoskeletal injury for some workers.

Question 5

Which type of ergonomic intervention involves modifying the workstation, tools, or equipment to reduce MSD risk?

Accepted Answer

Engineering control

Answer

Engineering controls involve physical modifications to workstations, tools, or equipment—such as adjustable desks or ergonomic hand tools—and are preferred over administrative controls under the hierarchy of controls.

SSH - Specialist Safety & Health Certified Practice Test

SSH - Specialist Safety & Health Certified Practice Test

SSH Ergonomics & Musculoskeletal Disorder Prevention