Answer :
Final answer:
A urinal's water supply must be protected by an approved vacuum breaker to prevent backflow. This is within the domain of water engineering, which ensures the safety and treatment of urban water supplies. The correct answer is 2) Vacuum Breaker.
Explanation:
The water supply to a urinal must be protected by an approved device to prevent backflow and ensure sanitation. The correct device to achieve this is a vacuum breaker. Vacuum breakers are anti-backflow devices that prevent the siphoning of potentially contaminated water back into the public water system, ensuring the water remains clean and safe for consumption and usage. This is especially important in the context of urban water systems, where the majority of the water comes from surface sources such as lakes, rivers, and reservoirs, or from groundwater. These systems are designed and managed by specialists in water engineering, whose job is to handle both the treatment of wastewater and of drinking water, ensuring the overall safety and usability of water in urban environments.
This device helps prevent backflow of contaminated water into the supply system, ensuring the water remains safe and clean. A vacuum breaker works by creating an air gap that breaks the siphonage effect, preventing any potential contamination from flowing back. Therefore, the correct answer is 2) Vacuum Breaker.
