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Ethylene oxide is a known carcinogen and mutagen. Noise (A), radiation (C), and silica (D) are unrelated. CIHs ensure exposure monitoring, ventilation, and leak detection in sterilization units.

Comprehensive and Detailed

Noise exposure is expressed in decibels using A-weighting (dBA) to approximate human ear sensitivity. Leq (equivalent continuous sound level) integrates fluctuating noise into an energy-equivalent measure. Pascals (Option A) express pressure but are not used directly for occupational exposure limits. Hertz (Option C) measures frequency. Candela (Option D) is a photometric unit unrelated to noise. A-weighted decibels align with occupational standards (OSHA, NIOSH, ACGIH). CIHs apply dosimetry to measure time-weighted exposures, interpret exchange rates (3- vs. 5-dB), and compare to permissible exposure limits (PEL) or TLVs. Noise metrics also inform hearing conservation, engineering control evaluations, and worker risk communication.

Hexavalent chromium is generated during welding, cutting, or grinding of stainless steel, and in electroplating. Food canning (A), paving (C), and grain handling (D) do not generate Cr(VI). CIHs monitor per OSHA methods, enforce exposure limits, and apply engineering controls with appropriate PPE.

Slouched sitting increases disc pressure more than standing upright or lying flat. Standing with bent knees also reduces load. CIHs use ergonomic assessments to recommend neutral postures and chair design.

Reflective shields and insulation reduce radiant heat exposure at the source/path. Rotation (A) and vests (C) reduce dose but not source. Hydration (D) is supportive, not preventive. CIHs recommend engineering controls as first priority.