Asbestos Hazard Emergency Response Act (AHERA) Certification Practice Exam

What does PCM stand for and what type of sample does it refer to?

1. Phase Contrast Microscope, for air sampling

2. Particle Counting Method, for water sampling

3. Precision Contrast Measurement, for dust sampling

4. Phase Contrast Measurement, for bulk sampling

The correct answer is: Phase Contrast Microscope, for air sampling

The acronym PCM stands for Phase Contrast Microscope. This term specifically refers to a method used for analyzing air samples to detect the presence of asbestos fibers. The use of a phase contrast microscope allows for the visualization of these fibers in a way that enhances their contrast against the background, making them easier to identify under microscopic examination. In environmental health and safety, particularly regarding asbestos, accurate detection and quantification of airborne fibers are critical. The PCM technique is widely recognized and is commonly employed in industrial hygiene assessments, particularly in locations where asbestos exposure may occur. Through air sampling and subsequent analysis via PCM, professionals can determine compliance with safety regulations and assess potential health risks to workers and the public. The other provided options, while they reference alternative sampling methods or techniques, do not correctly identify what PCM stands for nor the type of sample it relates to in the context of asbestos analysis.