Boeing 777 Electrics
1 / 15
What is the primary source of power for the transfer busses?
2 / 15
On ground no power connected to the airplane. Which items will be powered if you push the BATTERY switch ON?
3 / 15
The standby inverter converts DC power to AC power. The inverter powers the AC standby bus if the right transfer bus is not powered.
The standby inverter converts DC power to AC power. The inverter powers the AC standby bus if the left transfer bus is not powered.
4 / 15
The main battery provides standby power to the following:
5 / 15
What is the source of standby electrical power if the RAT sheds electrical power because of low hydraulic pressure?
6 / 15
If the RAT is unable to maintain RPM, the RAT generator electrical load is shed until RPM is satisfactory. Power for standby electrical loads is provided by the main battery during deployment of the RAT and when RAT generator loads are shed.
The RAT is deployed automatically if both AC transfer busses lose power in flight. The RAT can be manually deployed by pushing the RAM AIR TURBINE switch on the overhead panel.
7 / 15
Which one of the following is not a reason for the backup electrical system to automatically power one or both transfer busses?
8 / 15
What is the primary source of standby power if all normal AC and DC power source fail?
9 / 15
What is the primary power source for 'fly-by-wire'?
10 / 15
Which of the following is not a main AC electrical power source?
11 / 15
Which one of the following is not true about the standby inverter?
12 / 15
Which bus powers the main battery charger and the APU battery charger?
13 / 15
Which one of the following is not true about the backup electrical system?
14 / 15
You have a cold airplane (no power connected). Which items will be powered if you push the BATTERY switch ON?
15 / 15
The standby electrical system consists of:
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