Ergonomics and Physical Hazards Flashcards
7 cards from real COHN practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Ergonomics and Physical Hazards flashcards as text
A warehouse worker lifts 50-lb boxes from floor level repeatedly. Which ergonomic control is MOST effective as a primary intervention?
Answer: Raise the storage height to reduce floor-level lifting
Engineering controls that eliminate or reduce the hazard at the source are the preferred hierarchy-of-controls approach for manual material handling.
Which measurement tool is used to quantify the hand-arm vibration dose a worker receives over a shift?
Answer: Dosimeter calibrated to ISO 5349
ISO 5349 specifies measurement and evaluation of human exposure to hand-transmitted vibration using a vibration dosimeter.
A COHN is evaluating pinch-grip force requirements at an assembly line. Excessive pinch force is most associated with which condition?
Answer: De Quervain's tenosynovitis
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.
Under OSHA's General Duty Clause, an employer's ergonomics program is defensible if it demonstrates which key element?
Answer: A feasible abatement method was implemented for recognized hazards
The General Duty Clause requires employers to recognize and abate serious hazards using feasible methods; documented abatement is the core of a defensible program.
Which factor in the NIOSH Lifting Equation (NLE) penalizes lifts performed with significant body twisting?
Answer: Asymmetry Multiplier (AM)
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.
A COHN notes that a machine operator holds her arm elevated above shoulder height for extended periods. This posture primarily increases risk for which condition?
Answer: Rotator cuff tendinitis
Sustained overhead and above-shoulder postures impinge on rotator cuff tendons and bursae, leading to tendinitis or impingement syndrome.
Which lighting condition is classified as a physical hazard that a COHN should evaluate in an occupational health assessment?
Answer: Insufficient task lighting causing eyestrain and accident risk
Inadequate illumination is a recognized physical hazard that increases eyestrain, reduces accuracy, and raises the risk of accidents and injuries in the workplace.