Kentucky Boiler Practice Exam

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What type of water is not considered domestic?

Potable water
Sewage water
Rainwater
Groundwater

The correct answer is: Sewage water

Sewage water is not considered domestic because it is wastewater that has been contaminated with various substances from households, industries, or other sources. Domestic water typically refers to water that is used for everyday household purposes, such as drinking, cooking, and bathing, and it must meet certain health standards for safety and cleanliness. In contrast, sewage water has undergone processes that introduce biological contaminants, chemicals, and other pollutants, rendering it unsuitable for domestic use without treatment. Potable water, rainwater, and groundwater, on the other hand, are types of water that can be treated or utilized for domestic needs under appropriate conditions. Potable water is safe for consumption; rainwater can be collected and treated for use; while groundwater is often tapped for domestic supplies, provided it meets safety standards. Therefore, sewage water stands apart due to its quality and composition, making it inappropriate for domestic applications.