PSA Airlines Canadair Regional Jet Systems (PSA-CRJ) Practice Exam

What is the power output rating of the CRJ-700/900 TRUs?

1. 90 Amps

2. 120 Amps

3. 150 Amps

4. 100 Amps

The correct answer is: 120 Amps

The power output rating of the CRJ-700/900 TRUs is 120 Amps. This rating indicates the maximum current that the Transformer Rectifier Units (TRUs) can provide to supply electrical power to the aircraft's systems. In the context of regional jets like the CRJ-700 and CRJ-900, having the correct TRU power output is vital for ensuring that all electrical systems, including avionics, lighting, and other essential equipment, function properly during flight. The TRUs convert three-phase AC power from the engine's generators into the DC power needed to run the aircraft's systems. The 120 Amp rating reflects the demands of these systems and the efficiency of the electrical system design in these aircraft. It's essential for pilots and maintenance crews to understand this rating, as it plays a critical role in troubleshooting electrical issues and ensuring that the aircraft can adequately manage its power supply. Understanding the power output capabilities helps ensure the overall reliability and safety of aircraft operations.