Question 98

Used water from cooling equipment shall not be returned to the potable water system.

Returning used water from cooling equipment to the potable water system is prohibited to prevent contamination and ensure public health safety. This measure is crucial to maintain the integrity of drinking water supplies.

A) shall not be returned to the potable water system

This option is correct as it directly reflects health regulations aimed at protecting potable water sources from potential contamination due to the return of used water. Used water, which may contain pollutants, poses a significant risk if it were to be reintroduced into drinking water systems.

B) shall be filtered before returning to the potable water system

While filtering could reduce some contaminants, this option is incorrect because it suggests that used water can be returned to the potable system, which is against safety protocols. Filtration alone does not guarantee the removal of all harmful substances present in used water.

C) may enter a sediment tank before returning to the potable water system

This option is also incorrect. Although a sediment tank could remove some solids, it does not ensure the safety of the water for potable use. Therefore, allowing used water to enter a sediment tank before returning to the potable water system does not comply with health regulations.

D) may enter the potable water system through an indirect connection

This option is incorrect and suggests a loophole that is not acceptable in public health standards. Indirect connections can still lead to contamination, making it unsafe for used water to enter the potable system in any form.

Conclusion

Option A is definitively correct as it aligns with public health regulations that prohibit the return of used water to the potable water system to avoid contamination. All other options fail because they either suggest a method to treat or reuse contaminated water, which is not permissible under health standards. Protecting potable water sources from contamination is paramount for ensuring the safety and health of the public.