USCG USCG Electrical
Set 3 • Question #85 of 142
Launch Interactive Practice Room The electrical energy necessary to transmit a person's voice over a sound-powered telephone circuit is obtained from __________.
A
dry cell batteries
B
the ship's service switchboard
C
the emergency switchboard
D
the speaker's voice
✓ Correct Answer
USCG NMC Regulatory Explanation
In USCG Marine Electrical Systems (IEEE 45 and 46 CFR), regarding 'The electrical energy necessary to transmit a person's voice over a sound-powered telephone circuit is obtained from', the compliant technical standard is: 'the speaker's voice'.
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