Which of the following statements is true about a normally open (NO) proximity switch?
A. It is open when an object is present.
B. It is closed when an object is present.
C. It is open when no object is present.
D. It is closed when no object is present.
Answer:C
Which of the following statements is true about a normally open (NO) proximity switch?
A. It is open when an object is present. B. It is closed when an object is present. C. It is open when no object is present. D. It is closed when no object is present.
Explanation: A normally open proximity switch is open when no object is present and closes when an object is detected.