Question 376Electricity & Electronics - QMED

The correct answer is A) comes from each station's hand-cranked generator. The power necessary to energize the howler "relay" coil at the engine room station, as shown in illustration EL-0093, comes from the station's hand-cranked generator. This is because the howler system is designed to provide an emergency alarm even when the ship's main power is lost, and the hand-cranked generator ensures a reliable power source for this critical function. The other options are incorrect because: B) the power is not supplied from a battery or ship's power, as the system needs to function independently; C) pushing a button on the handset does not directly provide the power to the relay coil; and D) the power is not conducted through the relay's contacts, as that would only switch the circuit, not provide the necessary power.