A retroreflective device transmits the light to a reflector and detects the reflected light at its receiver.
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Q1: What kind of switches are designed to
Q3: The letters NO represent _.
A) not open
B)
Q4: _ switches are noncontact-type switches that are
Q5: A relay is a(n) _ switch.
Q6: Photoelectric switches have all but which of
Q7: The difference between a motor starter and
Q8: When a relay is in its de-energized
Q9: Pushbutton switches are manually operated and require
Q10: Which of the following is not a
Q11: What are the two versions of the
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