Which type of receptacle is considered improper for sanitation purposes?

The option identifying broken receptacles as improper for sanitation purposes is correct because broken receptacles pose significant safety hazards. These can include exposed wiring or sharp edges, which increase the risk of electrical shock or injury. Additionally, broken receptacles may not function properly, leading to the potential for spills or contamination when connecting sanitation equipment. Proper sanitation practices require that all equipment and receptacles be maintained in good working order to ensure a safe and hygienic environment.

In contrast, electrically insulated receptacles have been designed to prevent electrical shocks and are suitable for sanitation. Functional receptacles are those that work as intended and contribute positively to maintaining sanitation standards. Plastic receptacles may be acceptable depending on their condition and nature of use, as they can be easy to clean and resistant to corrosion. Thus, maintaining receptacles in a pristine and functional state is paramount in sanitation practices.