A worker's hand is at risk of injury from a mechanical shearing action. Which situation best describes a shearing hazard?
A hand caught between a moving blade and a fixed machine surface during operation
In this question, we need to identify which situation best describes a shearing hazard. Shearing hazards involve a situation where a body part, like a hand, is at risk of being caught and cut between two objects that move laterally relative to each other. Let's analyze the given options:
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A hand touching a hot metallic machine surface during maintenance activity: This describes a hazard due to heat, not mechanical shearing.
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A hand becoming entangled in a rotating machine shaft during operation: This situation is a caught-in hazard due to rotational motion, not a shearing action.
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A hand sliding repeatedly across a rough abrasive machine surface during work: This represents an abrasive or friction hazard, not a shearing hazard.
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A hand caught between a moving blade and a fixed machine surface during operation: This situation accurately represents a shearing hazard because it involves a part of the body being susceptible to injury from the lateral motion of a blade against a fixed surface.
Based on the analysis of each option, the correct answer is option 4: A hand caught between a moving blade and a fixed machine surface during operation. This scenario clearly describes a shearing hazard as it involves mechanical shearing, where a body part is caught between two surfaces, one of which is moving laterally.
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