Refer to the drawing of a motor and its control circuit (see figure).
Note: Relay contacts are shown open/closed according to the standard convention for control circuit drawings.
The motor has been operating for several hours when it is decided to stop the motor.
What is the status of the starting resistors before and after the motor STOP pushbutton is depressed?
A. Initially inserted in the motor circuit; bypassed immediately after the STOP pushbutton is depressed.
B. Initially inserted in the motor circuit; bypassed following a preset time delay after the STOP pushbutton is depressed.
C. Initially bypassed; bypass is removed immediately after the STOP pushbutton is depressed.
D. Initially bypassed; bypass is removed following a preset time delay after the STOP pushbutton is depressed.
Show Answer
Answer: C
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