Final answer:
A security guard must know the post orders because they outline the essential policies and procedures for their role, ensuring safety and consistency in their duties.
Step-by-step explanation:
A security guard should be familiar with the post orders for his or her site because the post orders set out the basic policies and procedures that the guard is required to follow. This is essential in maintaining the safety and security of the premises, as well as ensuring that the guard's actions are consistent with the expectations of their employer and the clients they are serving. While it's beneficial for security guards to have knowledge of post orders to answer public inquiries and be prepared for any internal checks or changes to the routine, the fundamental purpose is to guide their day-to-day responsibilities and actions on the job. A security guard should be familiar with the post orders for their site primarily because post orders set out the basic policies and procedures that the guard is required to follow. These orders serve as a comprehensive guide, outlining specific protocols, emergency procedures, and expectations tailored to the site's security needs. This familiarity ensures guards can respond appropriately to various situations, maintain a secure environment, and uphold the safety of individuals on the premises. While members of the public may inquire about post orders, the essential reason lies in providing guards with the necessary knowledge to perform their duties effectively and in accordance with established guidelines.