Experience the Quality With Free CIH Exam Questions That Helps Candidates Pass

Cutting, drilling, or grinding concrete releases respirable silica dust, posing silicosis and lung cancer risks. Painting (A) is not silica-related. Welding (C) may produce hexavalent chromium, not silica. Electrical wiring (D) is unrelated. CIHs implement controls per OSHA’s silica rule: water suppression, ventilation, monitoring, and respirators.

For short, intense exposures, the occupational exposure metric of concern is typically a short-term exposure limit (STEL) or ceiling value. These limits require time-resolved measurements that can capture rapid concentration changes. A photoionization detector (PID) configured for real-time logging at 1-second intervals provides high temporal resolution, allowing the hygienist to evaluate peak concentrations and compute rolling 15-minute averages aligned with STEL criteria. While an 8-hour integrated charcoal tube (Option A) is excellent for TWA evaluation and laboratory confirmation, it masks short-duration peaks by averaging them over many hours. A 2-hour passive badge (Option C) similarly lacks time resolution and may understate peak intensities. An area sample (Option D) does not represent the worker’s breathing zone and can be confounded by spatial variability and ventilation patterns. The best practice is to pair real-time PID screening with task-based personal sampling when possible; for comparison to numeric standards, ensure instrument calibration with an appropriate span gas, apply response factors for specific analytes like toluene, and document sampling start/stop times to align the dataset precisely with the task window.

AAS and ICP-AES are standard for metal quantification from filter digests. GC-FID (A) is for organics. UV-Vis (C) applies in some colorimetric methods but less common for metals. Ion selective electrodes (D) are specific to certain ions in solutions, not airborne particulates.

AES measures light emitted by excited atoms returning to ground state. Absorption (A) applies to AAS. Ionization (C) applies in MS. Chromatography (D) separates compounds, not emission. CIHs rely on AES/ICP for metals analysis.

TLDs store energy from ionizing radiation in crystal lattices, released as light upon heating, giving precise cumulative dose over weeks to months. Pocket ion chambers (A) provide immediate readings but can drift. Film badges (B) are older, less precise, and sensitive to environmental factors. Real-time dosimeters (D) are useful for instant feedback but not long-term integration. CIHs select TLDs for regulatory monitoring, backed by QA programs and calibration.