Referring to the containership one-line...

🔍 Key Concepts

• Follow the AC power path feeding the battery charger symbol from the nearest labeled bus or switchboard • Interpret how the DC output from the charger is connected to the 24 VDC battery banks (look for individual switches/links versus a solid common connection) • Note the difference between main switchboard vs. emergency switchboard 120 VAC sections in the one‑line diagram

💭 Think About

• From which labeled 120 VAC section does the cable to the battery charger actually originate on the diagram? Trace it step‑by‑step. • Does the DC side of the charger show separate selectable connections to each bank, or a single output tied to both banks at the same time? What do the symbols (switches/contactors) indicate? • Why would the ship designer prefer the charger to remain powered during a blackout, and which board would still have power then?

✅ Before You Answer

• Confirm exactly which bus is labeled at the point where the battery charger is connected ("Main Swbd. 120 VAC Section" or "Emergency Swbd. 120 VAC Section"). • Verify whether there are switch symbols or changeover contacts between the charger output and each 24 VDC battery bank, implying one bank at a time, or a common bus tying both banks together. • Ensure your choice matches both the AC power source location and the DC charging capability; eliminate options that are only half‑correct.

Referring to the containership one-line distribution diagram shown in the illustration, what statement is true concerning the battery charger? Illustration EL-0014

The battery charger gets its AC power from the 120 VAC section of the main switchboard and is capable of providing DC charging current to only one battery bank at a given time.

The battery charger gets its AC power from the 120 VAC section of the emergency switchboard and is capable of providing DC charging current to only one battery bank at a given time.

The battery charger gets its AC power from the 120 VAC section of the emergency switchboard and is capable of providing DC charging current to both battery banks simultaneously.

🔍 Key Concepts

💭 Think About

✅ Before You Answer