Refer to the drawing of a valve motor control circuit (see figure below).
Note: Limit switch (LS) contacts are shown open regardless of valve position, but relay contacts are shown open/closed according to the standard convention for control circuit drawings.
Which one of the following will actuate the alarm?
A. With the valve partially closed, the control switch is taken to the CLOSE position.
B. With the valve partially closed, the control switch is taken to the OPEN position.
C. With the valve fully open, the control switch is taken to the CLOSE position.
D. With the valve fully open, the control switch is taken to the OPEN position.
Show Answer
Answer: B
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