COHN Ergonomics and Physical Hazards 2

Question 1

A warehouse worker lifts 50-lb boxes from floor level repeatedly. Which ergonomic control is MOST effective as a primary intervention?

Accepted Answer

Raise the storage height to reduce floor-level lifting

Answer

Engineering controls that eliminate or reduce the hazard at the source are the preferred hierarchy-of-controls approach for manual material handling.

Question 2

Which measurement tool is used to quantify the hand-arm vibration dose a worker receives over a shift?

Accepted Answer

Dosimeter calibrated to ISO 5349

Answer

ISO 5349 specifies measurement and evaluation of human exposure to hand-transmitted vibration using a vibration dosimeter.

Question 3

A COHN is evaluating pinch-grip force requirements at an assembly line. Excessive pinch force is most associated with which condition?

Accepted Answer

De Quervain's tenosynovitis

Answer

De Quervain's tenosynovitis involves inflammation of the tendons controlled by the abductor pollicis longus and extensor pollicis brevis, aggravated by repetitive pinch-grip tasks.

Question 4

Under OSHA's General Duty Clause, an employer's ergonomics program is defensible if it demonstrates which key element?

Accepted Answer

A feasible abatement method was implemented for recognized hazards

Answer

The General Duty Clause requires employers to recognize and abate serious hazards using feasible methods; documented abatement is the core of a defensible program.

Question 5

Which factor in the NIOSH Lifting Equation (NLE) penalizes lifts performed with significant body twisting?

Accepted Answer

Asymmetry Multiplier (AM)

Answer

The Asymmetry Multiplier (AM) decreases the Recommended Weight Limit when the load is not lifted in the sagittal plane, reflecting the added spinal stress of twisting.

COHN Exam Practice Test

COHN Exam Practice Test

COHN Ergonomics and Physical Hazards 2