Florida Drinking Water Operator "B" Practice Test

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Study for the Florida Drinking Water Operator "B" Test. Use multiple choice questions, flashcards, and explanations to prepare. Ace your certification!

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What is a common method of physical disinfection?

Chlorination
Ultraviolet rays
Bromination
Iodination

The correct answer is: Ultraviolet rays

Ultraviolet (UV) rays are a well-recognized and widely used method of physical disinfection. This process relies on the application of UV light to inactivate microorganisms by disrupting their DNA, making it impossible for them to replicate and cause infections. Unlike chemical disinfection methods, which use substances that can interact with the water in various ways, UV disinfection does not add any chemicals to the water supply, making it a physically-based technique. UV disinfection is effective against a broad range of pathogens, including bacteria, viruses, and protozoa, and it can be used in various water treatment applications, including municipal drinking water systems and wastewater treatment. The efficiency of UV disinfection is influenced by factors such as the intensity of the UV light, the exposure time, and the clarity of the water, which must be free from significant turbidity for the process to be effective. While chlorination, bromination, and iodination are all valid methods of chemical disinfection, those processes introduce chemical agents into the water, and they operate differently compared to physical disinfection methods like UV treatment.