Which description best summarizes compounding adjustments?

• A. To adjust the interaction of the series and shunt fields to regulate voltage with load.
• B. To modify the mechanical governor settings
• C. To adjust the timing of the motor shutoff
• D. To control brush contact pressure

Answer: (A)

Compounding adjustments control how the series field interacts with the shunt field to shape the generator’s voltage as the load changes. In a compound-wound generator, the shunt field provides a baseline excitation tied to speed, while the series field adds excitation proportional to load current. By tweaking how much series excitation is added to the shunt field, you modify the overall field strength so the terminal voltage remains more stable under varying load. That descriptive idea—adjusting the interaction of the series and shunt fields to regulate voltage with load—is exactly what compounding adjustments are about. The other options point to speed control, shutdown timing, or brush pressure, which don’t describe the field interaction that governs voltage regulation with load.