ELECTRICAL SYSTEM Flashcards

1
Q
  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
A

a. from TR1

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2
Q
  1. 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
A

b. the RAT is automatically extended and powers the blue system which drives the emergency generators

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3
Q
  1. AC ESS Bus is normally supplied by?
    a. AC BUS 1
    b. AC BUS 2
    c. Emergency Generator
    d. Static Inverter
A

a. AC BUS 1

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4
Q
  1. 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
A

b. DC bus 1, DC bus 2 or batteries

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5
Q
  1. 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
A

b. to be supplied by any generator or external power

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6
Q
  1. 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
A

b. if the blue system is pressurized, the emergency generator comes on line

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7
Q
  1. Normal minimum battery voltage before APU start is:
    a. 22 V
    b. 25.5 V
    c. 27.5 V
    d. no minimum
A

b. 25.5 V

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8
Q
  1. 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.
A

a. for no more than 3 secs.

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9
Q
  1. On the EMER ELEC PWR panel, a red FAULT light illuminates under the “RAT and EMER GEN” label. What does it mean?
    a. RAT is not extended
    b. emergency generator is not supplying when AC bus 1 and 2 are not powered (above 100 kts) or DC bat bus is not powered
    c. emergency generator is supplying but AC ESS bus is not powered
    d. emergency generator is not supplying when AC bus 1 and 2 are not powered
A

d. emergency generator is not supplying when AC bus 1 and 2 are not powered

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10
Q
  1. What happens when the GEN 1 LINE pb is set to OFF?
    a. AC BUS 1 and 2 are not powered and emergency generator is automatically connected
    b. AC BUS 1 is powered by the GEN 2 because the GEN 1 is deactivated
    c. AC BUS 1 is powered by the GEN 2 because the GEN 1 line contactor is opened
    d. AC BUS 1 is not powered because the GEN 1 line contactor is opened and transfer contactor is not closed.
A

c. AC BUS 1 is powered by the GEN 2 because the GEN 1 line contactor is opened

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11
Q
  1. In cold aircraft configuration (no AC and no DC supply), where the batteries voltage can be checked?
    a. on the ECAM ELEC page
    b. on the ELEC overhead panel
    c. there is no indication
A

b. on the ELEC overhead panel

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12
Q
  1. AC ESS BUS is normally supplied by:
    a. AC BUS 1
    b. AC BUS 2
    c. Static inventer
A

a. AC BUS 1

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13
Q
  1. IN flight, On Batteries Only, the AC ESS SHED BUS and the DC ESS SHED BUS are lost:
    a. yes
    b. no
A

a. yes

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14
Q
  1. The static inventer works:
    a. always
    b. when A/C is in flight and on batteries only
    c. when one main generators fails
A

b. when A/C is in flight and on batteries only

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15
Q
  1. On ground, what happens when the “RAT and EMER GEN MAN ON P/B” is pressed in:
    a. the RAT is extended
    b. the emergency generator is activated

c . nothing

A

a. the RAT is extended

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16
Q
  1. The static inverter transforms the DC voltage from the battery bus into:
    a. single phase 115 V – 400 HZ AC current
    b. three phase 115/200 V – 400 HZ AC current
A

a. single phase 115 V – 400 HZ AC current

17
Q
  1. In flight, in case of loss of all main generators, emergency generator not running, the static inverter supplies:
    a. APU and ENG start + AC ESS bus
    b. ENG start + AC ESS + AC ESS shed bus
    c. ENG start
A

a. APU and ENG start + AC ESS bus

18
Q
  1. The external power has priority over the APU GEN:
    a. yes
    b. no
A

a. yes

19
Q
  1. GEN 1 and GEN 2, when operating, have priority over APU GEN:
    a. yes
    b. no
A

a. yes

20
Q
  1. With APU available, if one generator fails, the failed generator is replaced by:
    a. the APU
    b. the other GENERATOR
A

a. the APU

21
Q
  1. The ESS TR may be used to replace a faulty TR:
    a. yes
    b. no
A

a. yes

22
Q
  1. In flight, in case of loss of all generators, Emergency generator not running, the DC ESS bus is supplied by:
    a. BAT 2
    b. ESS TR
    c. both
A

a. BAT 2

23
Q
  1. In flight, in case of loss of all main generators, emergency generator running, the DC ESS BUS is supplied by:
    a. Hot bus
    b. ESS TR
    c. Both
A

b. ESS TR

24
Q
  1. The IDG regulates the generator:
    a. speed
    b. voltage
    c. frequency
A

a. speed

25
Q
  1. If AC bus 1 fails the AC ESS BUS is supplied by the:
    a. EMER GEN
    b. AC bus 2
    c. static inverter
A

b. AC bus 2

26
Q
  1. In case of total electrical loss the AC ESS BUS is supplied by:
    a. static inverter
    b. EMER GEN
    c. both
A

a. static inverter

27
Q
  1. In emergency configuration, AC ESS SHED BUS is automatically:
    a. shed if the RAT stalls
    b. supplied by static inverter when L/G is down
A

a. shed if the RAT stalls

28
Q
  1. Only one generator is operating in flight:
    a. main galley is automatically shed
    b. secondary galley is automatically shed
    c. all galleys are shed
A

a. main galley is automatically shed

29
Q
  1. Can you reconnect the IDG in flight?
    a. yes
    b. no
A

b. no

30
Q
  1. When GEN 1 or GEN 2 is selected off:
    a. the GEN is deenergized and line contactor is open
    b. the GEN is still energized and line contactor is open
A

a. the GEN is deenergized and line contactor is open

31
Q
  1. When the EXT PWR pb green AVAIL lite is illuminated, this means that:
    a. the EXT PWR is connected to the A/C
    b. the A/C network is supplied
A

a. the EXT PWR is connected to the A/C

32
Q
  1. When are the batteries supplying the DC BAT BUS:
    a. APU starting
    b. loss of AC bus 1
    c. loss of AC bus 1+2 (speed < 100 kts)
    d. a + c
A

d. a + c

33
Q
  1. When you want to check battery voltage, you must set the BAT pb to:
    a. auto position
    b. off position
A

b. off position

34
Q
  1. The battery FAULT light illuminates when:
    a. battery voltage < 25V
    b. battery pb set at OFF in flight
    c. charging current increases at an abnormal rate
A

c. charging current increases at an abnormal rate

35
Q
  1. In certain cases, the static inverter is supplied by:
    a. BAT 1 and BAT 2
    b. BAT 1
    c. DC BAT BUS
A

b. BAT 1

36
Q
  1. BUS TIE contactors when closed enable AC BUS 1 and 2:
    a. to be supplied by anyone of the main generators or external power
    b. to be supplied by APU generator or external power only
    c. to be connected in prallel
A

a. to be supplied by anyone of the main generators or external power

37
Q
  1. In case of the TR (1 or 2) failure, does the ESS TR supply the DC ESS BUS:
    a. yes
    b. no
A

a. yes

38
Q
  1. The green EXT PWR pb AVAIL light is ON what does it mean?
    a. the EXT power is plugged in, and parameters are normal
    b. the A/C network is supplied
A

a. the EXT power is plugged in, and parameters are normal