CIH CIH Ergonomics & Human Factors

Question 1

Which OSHA general industry standard directly addresses ergonomic hazards in the workplace?

Accepted Answer

OSHA's General Duty Clause (Section 5(a)(1))

Answer

While OSHA has no specific ergonomics standard for general industry, employers must address ergonomic hazards under the General Duty Clause requiring a workplace free from recognized hazards.

Question 2

What is the most common category of work-related musculoskeletal disorder (WMSD) affecting upper extremities in the US?

Accepted Answer

Carpal tunnel syndrome

Answer

Carpal tunnel syndrome is the most prevalent upper-extremity WMSD, caused by repetitive wrist motion, awkward postures, and vibration compressing the median nerve.

Question 3

The NIOSH Revised Lifting Equation calculates a Recommended Weight Limit (RWL) based on how many task variables?

Accepted Answer

6

Answer

The NIOSH Revised Lifting Equation uses six multipliers: horizontal distance, vertical height, vertical travel, asymmetry angle, frequency, and coupling quality.

Question 4

Which ergonomic risk factor is characterized by sustained muscle contraction without movement, reducing blood flow to tissues?

Accepted Answer

Static loading (static posture)

Answer

Static loading occurs when muscles contract continuously without movement, impairing circulation and accelerating fatigue and musculoskeletal tissue damage.

Question 5

What does the Lifting Index (LI) value represent in the NIOSH Lifting Equation?

Accepted Answer

The ratio of actual load to the Recommended Weight Limit

Answer

The Lifting Index equals the actual load weight divided by the RWL; values >1.0 indicate increased risk of musculoskeletal injury.

CIH - Certified Industrial Hygienist Exam Practice Test

CIH - Certified Industrial Hygienist Exam Practice Test

CIH CIH Ergonomics & Human Factors