問題一覧
1
Normal minimum battery voltage before APU start is:
25.5 V
2
The static inverter works:
when A/C is in flight and on batteries only
3
When you want to check battery voltage, you must set the BAT pb to:
off position
4
In emergency configuration, AC ESS SHED BUS is automatically:
shed if the RAT stalls
5
The battery FAULT light illuminates when:
charging current increases at an abnormal rate
6
AC BUS TIE contactors enable the electrical system:
to be supplied by any generator or external power
7
In case of total electrical loss the AC ESS BUS is supplied by:
static inverter
8
The static inverter transforms the DC voltage from the battery bus into:
single phase 115 V – 400 HZ AC current
9
In case of the TR (1 or 2) failure, does the ESS TR supply the DC ESS BUS:
Yes
10
BUS TIE contactors when closed enable AC BUS 1 and 2:
to be supplied by anyone of the main generators or external power
11
What happens in case of total loss of main generators?
the RAT is automatically extended and powers the blue system which drives the emergency generators
12
DC BAT BUS can be supplied by:
DC bus 1, DC bus 2 or batteries
13
In flight, in case of loss of all main generators, emergency generator not running, the static inverter supplies:
APU and ENG start + AC ESS bus
14
Only one generator is operating in flight:
main galley is automatically shed
15
AC ESS BUS is normally supplied by:
AC BUS 1
16
The green EXT PWR pb AVAIL light is ON what does it mean?
the EXT power is plugged in, and parameters are normal
17
When GEN 1 or GEN 2 is selected off:
the GEN is deenergized and line contactor is open
18
Can you reconnect the IDG in flight?
No
19
When are the batteries supplying the DC BAT BUS:
Both (APU starting ) and (loss of AC bus 1+2 (speed < 100 kts) )
20
On the EMER ELEC PWR panel, a red FAULT light illuminates under the “RAT and EMER GEN” label. What does it mean?
emergency generator is not supplying when AC bus 1 and 2 are not powered
21
In flight, in case of loss of all generators, emergency generator not running, the DC ESS bus is supplied by:
BAT 2
22
The external power has priority over the APU GEN:
Yes
23
The ESS TR may be used to replace a faulty TR:
Yes
24
With APU available, if one generator fails, the failed generator is replaced by:
the APU
25
On ground, what happens when the “RAT and EMER GEN MAN ON P/B” is pressed in:
the RAT is extended
26
GEN 1 and GEN 2, when operating, have priority over APU GEN:
Yes
27
When the EXT PWR pb green AVAIL lite is illuminated, this means that:
the EXT PWR is connected to the A/C
28
Generators are sometimes connected in parallel:
No
29
In certain cases, the static inverter is supplied by:
BAT 1
30
In cold aircraft configuration (no AC and no DC supply), where the batteries voltage can be checked?
on the ELEC overhead panel
31
If AC bus 1 fails the AC ESS BUS is supplied by the:
AC bus 2
32
When disconnecting the IDG, the button should be pressed:
for no more than 3 secs.
33
AC ESS Bus is normally supplied by?
AC BUS 1
34
In flight, in case of loss of all main generators, emergency generator running, the DC ESS BUS is supplied by:
ESS TR
35
IN flight, On Batteries Only, the AC ESS SHED BUS and the DC ESS SHED BUS are lost:
Yes
36
What happens when the GEN 1 LINE pb is set to OFF?
AC BUS 1 is powered by the GEN 2 because the GEN 1 line contactor is opened
37
In normal configuration, How is DC ESS BUS supplied?
from TR1
38
The IDG regulates the generator:
speed
39
What happens during the EMER GEN test?
if the blue system is pressurized, the emergency generator comes on line