A factory has machinery that produces continuous excessive noise. Which control is most effective for protecting workers?
Correct answer: A. Reducing noise at the machinery source
- A. Reducing noise at the machinery source
- B. Providing cotton wool for the ears
- C. Allowing workers to shout during the shift
- D. Increasing the length of each work period
Explanation
Controlling noise at its source is the most effective level in the hierarchy of controls. Ear protection is useful, but cotton wool gives unreliable protection and does not replace engineering control.
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About Environmental Health and Sanitation
Environmental health examines how water, air, food, housing, waste, noise, chemicals and workplace conditions affect disease and well-being. Sanitation content includes safe water treatment and storage, sewage and solid-waste disposal, food hygiene, vector control and the distinction between personal cleanliness and broader public-health sanitation.
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