The temperature of the water in a storage tank is monitored by a bistable alarm circuit.
If water temperature decreases to 50°F, a bistable turns on to actuate an alarm indicator.
As soon as the water temperature exceeds 50°F, the bistable turns off to clear the alarm.
Which one of the following bistable symbols indicates the characteristics of the bistable used in the alarm circuit?
A. 1.
B. 2.
C. 3.
D. 4.
Show Answer
Answer: A
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