Which method would ordinarily NOT be used for sterilizing milk plant equipment?

The use of sodium fluoroacetate for sterilizing milk plant equipment is inappropriate because it is not a recognized method for sanitation or sterilization in food processing environments. Sodium fluoroacetate is primarily known as a pesticide and is harmful to humans and animals. Its application in a food production setting poses significant health risks, including toxicity, which is contrary to food safety standards.

In contrast, live steam, chlorine solution, and hot water are accepted and effective methods for the sanitization of equipment in milk processing. Live steam effectively penetrates surfaces and kills microorganisms through high temperatures. Chlorine solutions are commonly used due to their antimicrobial properties, making them suitable for cleaning food contact surfaces. Similarly, hot water sanitization is a standard practice that utilizes high temperatures to eliminate bacteria and pathogens. Therefore, the inclusion of sodium fluoroacetate in this context is not only ineffective for sterilization but also poses serious health hazards, making it the correct choice as the method ordinarily not used for this purpose.