A320/321 Electrical System 100% Solution Revised 2023//2024

A320/321 ELECTRICAL SYSTEM 100% SOLUTION REVISED 2023//2024 1. In normal configuration, How is DC ESS BUS supplied? a. from TR1 b. from ESS TR c. from TR 2 d. from Bat 2 - ANSWER a. from TR1 2. What happens in case of total loss of main generators? a. the RAT is automatically extended and powers the yellow system which drives the emergency generator b. the RAT is automatically extended and powers the blue system which drives the emergency generators c. the RAT has to be manually extended d. the RAT extended and mechanically connected to the emergency generator - ANSWER b. the RAT is automatically extended and powers the blue system which drives the emergency generators 3. AC ESS Bus is normally supplied by? a. AC BUS 1 b. AC BUS 2 c. Emergency Generator d. Static Inverter - ANSWER a. AC BUS 1 4. DC BAT BUS can be supplied by: a. DC bus 1 or batteries b. DC bus 1, DC bus 2 or batteries c. DC bus 2 or batteries - ANSWER b. DC bus 1, DC bus 2 or batteries 5. AC BUS TIE contactors enable the electrical system: a. to be connected in a parallel b. to be supplied by any generator or external power c. to be supplied by APU GEN or EXT PWR only - ANSWER b. to be supplied by any generator or external power 6. What happens during the EMER GEN test? a. the ram air turbine (RAT) is extended b. if the blue system is pressurized, the emergency generator comes on line c. the green system is pressurized and the emergency generator comes on line supplied by hot bus 2 - ANSWER b. if the blue system is pressurized, the emergency generator comes on line 7. Normal minimum battery voltage before APU start is: a. 22 V b. 25.5 V c. 27.5 V d. no minimum - ANSWER b. 25.5 V 8. When disconnecting the IDG, the button should be pressed: a. for no more than 3 secs. b. for longer than 3 secs. c. until fault light goes out d. for no more than 5 secs. - ANSWER a. for no more than 3 secs