Question 23Electricity & Electronics - 1st Asst/Chief

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Which of the following electrical schematic symbols represents a normally closed flow switch? Illustration EL-0059

Diagram for USCG Electrical Chief: Which of the following electrical schematic symbols represents a normally...
A6
B7
C11
D14
AI Explanation

A) 6 is the correct answer. The symbol for a normally closed flow switch is a symbol with two parallel lines and an arrow pointing down, which represents the default closed position of the switch. This matches the symbol labeled 6 in the illustration EL-0059. The other options are incorrect because they represent different electrical components, such as a transformer (7), a normally open switch (11), or a fuse (14), which do not accurately depict the symbol for a normally closed flow switch.

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Official Resources
46 CFR Electrical Engineering 46 CFR Machinery & Electrical USCG National Maritime Center
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