Water Distribution Grade 1 Certification Practice Exam

Which category completes the following: physical, chemical, biological, _______________?

1. Atmospheric

2. Radiological

3. Geological

4. Fluid

The correct answer is: Radiological

The correct answer is radiological. In the context of water quality and safety, the categories of contaminants are typically classified into physical, chemical, biological, and radiological. Each of these categories addresses different types of potential hazards that can affect water quality. Physical contaminants pertain to things like sediments and particulate matter that can affect the appearance and clarity of water. Chemical contaminants include various inorganic and organic substances that can pose health risks. Biological contaminants encompass microorganisms, such as bacteria, viruses, and parasites, that can lead to waterborne diseases. Radiological contaminants refer to radioactive substances, which can originate from natural sources or human activities and can pose significant health risks if present in drinking water. As such, radiological contaminants are a crucial category to consider when assessing water quality, particularly in regions where there is a potential for exposure to radiation. The other options—atmospheric, geological, and fluid—do not fully align with the established categories for assessing water quality. Therefore, the appropriate and most relevant completion for the list is radiological, making it the correct choice.