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QT A320 > ATA24 - Electrical > Flashcards

ATA24 - Electrical Flashcards

1
Q 
1. AC ESS BUS is normally supplied by :
AC BUS 1
AC BUS 2
EMER-GEN
STATIC INVERTER
A

AC BUS 1

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2
Q

The EXTERNAL POWER has priority over the APU GEN :
Yes
No

A

Yes

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3
Q
  1. The STATIC INVERTER transforms the DC power from Battery 1 into one KVA :
    Single-phase 115 V - 400 HZ AC power
    Three phase 115/200 V - 400 HZ AC power
A

Single-phase 115 V - 400 HZ AC power

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4
Q

In flight, on batteries only, the AC ESS SHED and the DC ESS SHED buses are lost :
Yes
No

A

Yes

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5
Q 
5. In normal configuration, how is DC ESS BUS supplied ?
From TR 1
From ESS TR
From TR 2
From BAT 2
A

From TR 1

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6
Q
  1. The STATIC INVERTER works :
    All the time
    When A/C is in flight or on ground (speed < 50kt) and on batteries only
    When one MAIN GENERATOR fails
A

When A/C is in flight or on ground (speed < 50kt) and on batteries only

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7
Q 
7. Normal minimum battery voltage before APU start is :
22 V
25 V
27.5 V
No minimum
A

25 V

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8
Q
  1. In flight with BAT only, the AC ESS BUS is supplied by :
    STATIC INVERTER
    EMER GEN
    Both
A

STATIC INVERTER

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9
Q
  1. What happens when the GEN 1 LINE push button is set to OFF ?
    AC BUS 1 and 2 are not powered and emergency generator is automatically
    connected
    AC BUS 1 is powered by the GEN 2 because the GEN 1 is desactived
    AC BUS 1 is powered by the GEN 2 because the GEN 1 line contactor opens
A

AC BUS 1 is powered by the GEN 2 because the GEN 1 line contactor opens

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10
Q
  1. What does an “AVAIL” EXT PWR push button illumination in GREEN mean :
    The EXT PWR is plugged in and external power parameters are normal
    The A/C network is supplied
A

The EXT PWR is plugged in and external power parameters are normal

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11
Q

. A Generator Control Unit (GCU) controls :
Voltage of the generator
Frequency of the generator
both answers are correct

A

both answers are correct

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12
Q 
12. 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
ENG START + AC ESS BUS + AC ESS SHED BUS
ENG START
A

APU and ENG START + AC ESS BUS

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13
Q
  1. What happens during the EMER GEN TEST if AC NORMAL BUSES are supplied ?
    The RAM AIR TURBINE (RAT) is extended
    The EMER GEN is driven hydraulically if the BLUE ELECTRIC PUMP is running
    and the AC ESS BUS and the DC ESS BUS are connected to the emergency
    generator
    The GREEN system is pressurized and the emergency generator comes on line
A

The EMER GEN is driven hydraulically if the BLUE ELECTRIC PUMP is running
and the AC ESS BUS and the DC ESS BUS are connected to the emergency
generator

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14
Q

. When disconnecting the IDG the button should be pressed :
For no more than 3 sec
For longer than 3 sec
Until fault light goes out

A

For no more than 3 sec

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15
Q

What happens in case of total loss of main generators ?
The RAT is automatically extended and powers the YELLOW hydraulic system
which drives the EMER GEN
The RAT is automatically extended and powers the BLUE hydraulic system which
drives the EMER GEN
The RAT has to be manually extended and mechanically connected to the
emergency generator

A

The RAT is automatically extended and powers the BLUE hydraulic system which
drives the EMER GEN

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16
Q 
In flight, in case of loss of all main generators, emergency generator running, the DC
ESS BUS is supplied by the :
HOT BUS
ESS TR
Both answers are correct
17
Q
  1. When is the DC BAT BUS supplied by the batteries ?
    APU starting
    Loss of AC BUS 1 + 2 (speed<100 kts)
    Both answers are correct
A

Both answers are correct

18
Q
  1. In emergency configuration, AC ESS SHED BUS is automatically :
    SHED during RAT deployement
    Supplied by STATIC INVERTER when L/G is down
A

SHED during RAT deployement

19
Q
  1. Can you reconnect the IDG in flight ?
    Yes
    No
20
Q
  1. When operating, GEN 1 and GEN 2 have priority over APU GEN :
    Yes
    No
21
Q
  1. On the EMER ELEC PWR panel, a FAULT light illuminates in red under the “RAT AND
    EMER GEN label”. What does it mean ?
    RAT is not extended
    Emergency generator is supplying but AC ESS BUS is not powered
    Emergency generator is not supplying power when AC BUS 1 and 2 are not
    powered
A

Emergency generator is not supplying power when AC BUS 1 and 2 are not
powered

22
Q
  1. Generators are sometimes connected in parallel :
    Yes
    No
23
Q
  1. When APU is available, if one generator fails, the failed generator is replaced by :
    The APU
    The other generator
24
Q 
24. In cold aircraft configuration (No AC and no DC supply), where can the batteries
voltage can be checked ?
On the ECAM ELEC PAGE
On The ELEC OVERHEAD PANEL
There is no indication
A

On The ELEC OVERHEAD PANEL

25
25. The ESS TR is used when a TR is faulty : Yes No
Yes
26
26. DC BAT BUS can be supplied by : DC BUS 1 or batteries DC BUS 1, DC BUS 2 or batteries DC BUS 2 or batteries
DC BUS 1, DC BUS 2 or batteries
27
27. AC BUS TIE CONTACTORS enable the electrical system : To be connested in parallel To be supplied by any generator or external power To be supplied by APU GEN or EXT PWR only
To be supplied by any generator or external power
28
28. Only one generator is operating in flight : A part of the galley load is automatically shed Galley load must be manually shed All galleys are shed
A part of the galley load is automatically shed
29
29. When GEN 1 or GEN 2 is selected to "OFF" position : The GEN is de-energized and line contactor opens The GEN is still energized and line contactor opens
The GEN is de-energized and line contactor opens
30
30. On ground what happens with the RAT if the EMER ELEC PWR MAN ON is pressed ? The RAT is extended The emergency generator is actived Nothing
The RAT is extended
31
31. On newer aircraft, if AC BUS 1 fails the AC ESS BUS is supplied by : EMER GEN AC BUS 2 STATIC INVERTER
AC BUS 2
32
32. The BAT FAULT LIGHT illuminates amber when : BATTERY VOLTAGE is low BATTERY P/B switch is at OFF in flight Charging current increases outside limits
Charging current increases outside limits
33
``` 33. In flight, in case of LOSS of all main genarators, emergency generator not running, the DC ESS BUS is supplied by : HOT BUS 2 ESS TR Both answers are correct ```
HOT BUS 2
34
34. During preliminary cockpit preparation, to check BATTERY VOLTAGE, you must set the BAT P/B to : AUTO POSITION OFF POSITION
OFF POSITION
35
35. In flight when the RAT is automatically extended : The BLUE HYDRAULIC SYSTEM is pressurized but the EMERGENCY GEN is not running The GREEN HYDRAULIC SYSTEM is pressurized and the EMERGENCY GEN runs The BLUE HYDRAULIC SYSTEM is pressurized and the EMERGENCY GEN runs
The BLUE HYDRAULIC SYSTEM is pressurized and the EMERGENCY GEN runs

QT A320 (21 decks)

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