Marine Electrical Systems USCG Question #914 (Set 31)

As shown in all four diagrams included in the illustration, what type of logic circuit is represented? EL-0233

USCG Exam Illustration EL-0233
USCG Examination Diagram: Illustration EL-0233
Official USCG Answer & Rule Citation

Correct Answer: Option B — NAND gate

A NAND gate produces a logic low output only when all of its inputs are high, representing the logical complement of an AND operation as applied in IEEE 45 compliant shipboard automation and interlocking control logic circuits.

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