🔍 Key Concepts

• Look carefully at where the ammeter symbol (A) is placed in the circuit relative to the rectifier bridge and the cables going to the protective anodes and reference anodes. • Notice that the reference anodes have a selector switch and a voltmeter, while the protective anodes do not show an individual selector switch near the meter in question. • Think about whether the ammeter is in a single branch or in a common return/feeder that serves more than one anode.

💭 Think About

• Trace the current path from the rectifier bridge output, through the ammeter, and then to the anodes on the hull. Does the ammeter sit in a line that all protective anode currents must pass through, or only one? • Compare how the reference anodes are monitored versus how the protective anodes are monitored in this diagram. Which device (ammeter or voltmeter) is associated with each group? • Ask yourself: is there any switching device drawn in series with the ammeter that would allow you to select one anode at a time, or is it fixed in a single location in the main circuit?

✅ Before You Answer

• Identify exactly which conductor(s) the ammeter is inserted into and whether that conductor is common to all protective anodes or to just one. • Verify whether the selector switch shown is connected to the voltmeter (V) and reference anodes, or to the ammeter (A) and protective anodes. • Confirm whether any part of the diagram shows a separate control winding or other control circuit in series with the ammeter, or if the meter is only in the main anode output line.