7. AC ELECTRICAL LOAD DISTRIBUTION

What is the primary objective of AC electrical load distribution?. To control the engine speed. To control the energy for the main buses, galley buses, and IFE/PASS SEAT buses. To control the cabin pressure.

What is the function of the Load Shed?. To reduce the aircraft's speed. To protect the source of energy from overload. To increase the aircraft's altitude.

Which unit controls the Load Shed function?. The engine control unit (ECU). The flight management system (FMS). The Bus Power Control Unit (BPCU).

How many types of load shedding are there?. 1. 2. 3.

Which action happens when the APU is the only AC source in flight (Configuration Load Shed)?. The BPCU opens all galley and main bus relays. The BPCU closes all galley and main bus relays. The BPCU does nothing.

When does Command Load Shed occur?. When the APU EGT is high. When a crew member commands it. When the generators are overloaded.

What action occurs when the APU EGT is high (APU EGT High)?. The BPCU opens the galley and main bus relays. The BPCU closes all the relays. The BPCU does nothing.

At what values of current does the overcurrent load shed act?. 274 Amps for 300 seconds and 340 Amps for 5 seconds. 200 Amps for 60 seconds and 250 Amps for 10 seconds. 150 Amps for 100 seconds and 200 Amps for 30 seconds.

What is the first step of the operation with a unique IDG during an Overcurrent Load Shed?. The BPCU opens first the IFE/PAX SEAT bus relays. The BPCU opens first the galley and main bus relays alimented by the AC transfer bus 2. The BPCU does nothing.