Outline a basic electrical system ground test using a load bank.

Outline a basic electrical system ground test using a load bank.

• A. Install the load bank and measure insulation resistance.
• B. Connect load bank to the system, energize to simulate load, monitor voltage and current for stability, ensure balance, then de-energize and document results.
• C. Disconnect all power and perform a pulse test on the avionics.
• D. Run the system with the load bank while recording only current.

Answer: (B)

This tests how to perform a basic electrical system ground test with a load bank by applying a controlled load to verify the system can carry the expected current without excessive voltage drop or instability. The correct approach is to connect the load bank to the system and energize it to simulate the real load the aircraft would experience. While the load is applied, monitor the bus voltages and currents to confirm they stay within specified limits and that the loads are balanced across phases. After confirming stability and balance, de-energize and document the results, including voltage levels, current draws, and any deviations. This approach focuses on live-load performance and record-keeping essential for maintenance. The other options don’t align with a basic load-bank ground test: measuring insulation resistance with the load bank is a separate check, pulsing tests with power disconnected isn’t applying the intended load, and recording only current omits voltage behavior and balance critical to the test.

This tests how to perform a basic electrical system ground test with a load bank by applying a controlled load to verify the system can carry the expected current without excessive voltage drop or instability. The correct approach is to connect the load bank to the system and energize it to simulate the real load the aircraft would experience. While the load is applied, monitor the bus voltages and currents to confirm they stay within specified limits and that the loads are balanced across phases. After confirming stability and balance, de-energize and document the results, including voltage levels, current draws, and any deviations. This approach focuses on live-load performance and record-keeping essential for maintenance. The other options don’t align with a basic load-bank ground test: measuring insulation resistance with the load bank is a separate check, pulsing tests with power disconnected isn’t applying the intended load, and recording only current omits voltage behavior and balance critical to the test.