CIH CIH Ergonomics & Human Factors 3

Question 1

What percentage of all occupational injuries and illnesses in the US do musculoskeletal disorders (MSDs) typically represent?

Accepted Answer

Approximately 30%

Answer

MSDs consistently account for roughly one-third of all occupational injuries and illnesses recorded in OSHA 300 logs, making them the largest single category.

Question 2

Which early symptom should prompt an employer to investigate potential ergonomic hazards before a recordable injury occurs?

Accepted Answer

Worker reports of persistent discomfort, pain, or numbness during work tasks

Answer

Persistent discomfort, tingling, or numbness reported during or after work tasks are early warning signs of developing MSDs that warrant ergonomic intervention.

Question 3

In ergonomics, 'contact stress' refers to what type of hazard?

Accepted Answer

Localized mechanical pressure on soft tissue from hard surfaces or edges

Answer

Contact stress occurs when hard edges of tools, workbenches, or equipment press against soft tissues, compressing nerves, tendons, and blood vessels.

Question 4

The OSHA ergonomics guidelines for meatpacking (1990) and nursing homes focus primarily on reducing which type of MSD?

Accepted Answer

Low back disorders from manual patient handling and heavy lifting

Answer

OSHA's industry-specific ergonomics guidelines for meatpacking and nursing homes center on preventing low back injuries from manual lifting, patient transfers, and forceful exertion.

Question 5

Which NIOSH document provides guidance on designing computer workstations to reduce upper extremity and neck MSDs?

Accepted Answer

NIOSH Pub. 97-117 (Elements of Ergonomics Programs)

Answer

NIOSH Publication 97-117, 'Elements of Ergonomics Programs,' outlines a workplace program approach including workstation evaluation applicable to computer workstations.

CIH - Certified Industrial Hygienist Exam Practice Test

CIH - Certified Industrial Hygienist Exam Practice Test

CIH CIH Ergonomics & Human Factors 3