IFPS Hydraulic Specialist Certification Practice Exam

The type of switch that is triggered by the physical contact of a moving part is indeed the contact limit switch. This system typically operates in applications where the position of an object needs to be detected. When a moving part, such as a lever or actuator, makes contact with the switch, it completes an electrical circuit, thereby allowing the switch to either open or close. This functionality is crucial in various automated processes, ensuring that machines operate within safe and predefined limits.

In contrast, a non-contact limit switch operates without needing physical interaction, utilizing sensing technologies like magnetic fields or infrared signals. A pressure switch is designed to detect changes in pressure within a system but does not rely on the movement of a physical part for its operation. Similarly, a tachometer measures the speed of a rotating object and does not function as a switch activated by physical contact. Each of these alternatives serves distinct purposes that do not involve the same operational principle as a contact limit switch.