Which component provides electrical power to the UH-72 when the engines are running?

• A. External Power Unit
• B. Starter/Generators
• C. Battery
• D. Hydraulic pump

Answer: (B)

Electrical power for the UH-72 when the engines are running comes from the Starter/Generators. These units are driven by the engines and convert mechanical energy into electrical energy to feed the aircraft’s electrical system, while also serving as the starting motors to crank the engines when needed. The External Power Unit is used to supply power on the ground or when engines aren’t running, not during normal flight. The battery provides backup and starting power, but the primary electrical load is handled by the engine-driven generators, which are continually powered and can also recharge the battery. The hydraulic pump is a hydraulic component, not a power source for the electrical system.