Electrician Red Seal · Question
What is the typical function of a 'limit switch' in an industrial control system?
A limit switch is an electromechanical device that uses an actuator to operate electrical contacts, primarily to detect the presence or absence of an object, or
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Question: What is the typical function of a 'limit switch' in an industrial control system?
Answer options:
- To limit the current in a motor circuit. ✅ To detect the presence or absence, or the position, of a machine part or object.
- To limit the operating voltage of a control circuit.
- To provide over-temperature protection for motors.
Correct answer: To detect the presence or absence, or the position, of a machine part or object.
Explanation: A limit switch is an electromechanical device that uses an actuator to operate electrical contacts, primarily to detect the presence or absence of an object, or its position, in industrial machinery.
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