A thru-beam sensor has the shortest sensing range of the three types of photo sensors.
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Q23: The device represented by the symbol is
Q25: The motor starter coil M is:
Q29: Any overload current is sensed by the:
Q30: The symbol shown is that for a:
Q32: In the motor starter circuit shown,the main
Q33: Digital sensors are sometimes called discrete sensors
Q34: A limit switch is usually actuated by:
A)hand.
B)pressure.
C)contact
Q35: A proximity switch can be actuated:
A)without any
Q37: The abbreviations NO (normally open) and NC
Q40: A contactor:
A)is another name for a relay.
B)is
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