What is drawn on top of the square box is used to symbolize the type of annunciator. A ___ symbolizes a buzzer or some type of clapper

What is drawn on top of the square box is used to symbolize the type of annunciator.

A ___________ symbolizes a buzzer or some type of clapper.

A) flapper
B) square
C) none of the answers
D) circle

Show Answer

Answer:D

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