What equipment must a P.S.O operate on screening posts?

A Protective Security Officer (P.S.O) operating at screening posts is primarily responsible for ensuring the safety and security of a facility. The equipment that is crucial in fulfilling this role includes metal detectors and x-ray machines. Metal detectors are utilized to detect metallic objects that could pose a security threat, while x-ray machines are essential for scanning bags and packages to identify any potentially dangerous items concealed within them. This combination of tools aids in thorough screening to prevent prohibited items from entering secured areas.

The other choices, while related to security, do not specifically pertain to the fundamental tasks of a P.S.O at screening posts. Security cameras and alarm systems are typically used for surveillance and monitoring rather than direct screening. Access control systems and visitor logs are useful for managing entry points, but they do not engage in physical screening of individuals or belongings. Communication devices and mobile phones support coordination and communication, but they do not contribute to the screening process itself. Therefore, the correct choice highlights the specific tools necessary for effective and comprehensive security screening duties.