🔍 Key Concepts

• AC (alternating current) vs DC (direct current) and what each is used for on a vessel • Common circuit components that change voltage vs components that change current type • Which device’s main job is to convert AC into DC

💭 Think About

• First, recall which of these devices is specifically designed to turn AC into DC, not just raise or lower voltage. • Think about where on a ship you’d find equipment that needs DC power but is supplied with AC from the generator—what component makes that possible? • Go through each option and ask yourself: does this device mainly change the form of current, store electrical energy, or measure/bypass current?

✅ Before You Answer

• For each choice, decide: does it convert AC to DC, store charge, change voltage, or divert/measure current? • Be sure you can define each term: current transformer, rectifier, condenser, and shunt in simple words. • Eliminate any option that does NOT have conversion from AC to DC as its primary function.