The document contains 10 practice questions related to symmetrical components for electrical circuits: 1. Find symmetrical components of line currents for an unbalanced star-connected load. 2. Determine symmetrical components of given line voltages and draw the vector diagram. 3. Calculate symmetrical components of phase currents for a delta-connected balanced load. 4. Use symmetrical components to calculate active and reactive power for a delta-connected circuit. 5. Use symmetrical components to calculate active and reactive power for another delta-connected circuit. 6. Build line currents vectors for a transformer circuit given symmetrical components. 7. Determine line currents and symmetrical components before and after a line fault in a delta load. 8. Calculate branch currents