A220 Electrical Exam With complete solution– Expert
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1. Study the electrical system synoptic pages to help visualize the following
questions: -
2. The aircraft uses ___ VAC electrical power. - a. 115
3. What is the AC electrical sources? - a. 2 variable frequency generators (VFGs)
b. 1 APU VFG
c. RAT d. External power
4. What are the 3 AC busses? - a. AC BUS 1
b. AC BUS 2
c. AC ESS BUS
5. The aircraft uses ____ VDC electrical power. - a. 28
6. What are the DC power sources? - a. 3 TRUs
b. 2 nickel cadmium (NiCad) batteries
c. 2 magnet alternator generators (PMAGs)
7. How many DC busses are there? - a. 8
, 8. How many are displayed on the EICAS? - a. 6
9. What 2 busses aren't shown? - a. BAT DIR BUSSES 1 and 2
10. What is an EPC? How many? What is their function? - a. Electrical Power
Centers
b. 3 (EPC 1, EPC 2, EPC 3)
c. Power isolation and distribution
11. What do the PMAGs provide power for? - a. FADEC
b. Fly by wire power converter (FBWPC)
12. What is the kVA for the VFGs on the engines? - a. 75 kVA
13. Where are the VFGs located on the engine? - a. Accessory gearbox
14. How are the VFGs cooled? - a. Self-contained oil system
15. Where is the APU VFG mounted? - a. APU accessory gear box
16. How many KVA is the APU VFG? - a. 75 KVA up to FL365
17. What do the Generator Control Units do? - a. Regulate voltage
b. Control contactors to connect and disconnect VFGs to AC busses
c. Protect electrical circuits
Verified | Latest Version | 100 Guaranteed Success
1. Study the electrical system synoptic pages to help visualize the following
questions: -
2. The aircraft uses ___ VAC electrical power. - a. 115
3. What is the AC electrical sources? - a. 2 variable frequency generators (VFGs)
b. 1 APU VFG
c. RAT d. External power
4. What are the 3 AC busses? - a. AC BUS 1
b. AC BUS 2
c. AC ESS BUS
5. The aircraft uses ____ VDC electrical power. - a. 28
6. What are the DC power sources? - a. 3 TRUs
b. 2 nickel cadmium (NiCad) batteries
c. 2 magnet alternator generators (PMAGs)
7. How many DC busses are there? - a. 8
, 8. How many are displayed on the EICAS? - a. 6
9. What 2 busses aren't shown? - a. BAT DIR BUSSES 1 and 2
10. What is an EPC? How many? What is their function? - a. Electrical Power
Centers
b. 3 (EPC 1, EPC 2, EPC 3)
c. Power isolation and distribution
11. What do the PMAGs provide power for? - a. FADEC
b. Fly by wire power converter (FBWPC)
12. What is the kVA for the VFGs on the engines? - a. 75 kVA
13. Where are the VFGs located on the engine? - a. Accessory gearbox
14. How are the VFGs cooled? - a. Self-contained oil system
15. Where is the APU VFG mounted? - a. APU accessory gear box
16. How many KVA is the APU VFG? - a. 75 KVA up to FL365
17. What do the Generator Control Units do? - a. Regulate voltage
b. Control contactors to connect and disconnect VFGs to AC busses
c. Protect electrical circuits
