Elec Flashcards

1
Q

How many main generator?

A

3

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2
Q

Any 1 generator has sufficient capacity to supply all essential flight loads. True or False?

A

True

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3
Q

When the right engine starts and APU is off, Which systems are powered by the IDG?

A

Both right and left main buses

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4
Q

Both ext power is ON. Then Apu is ON. Which will happen?

A

Left main bus start to be powered by APU.

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5
Q

You have unpowered airplane.

A

Battery bus powered

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6
Q

Power is removed from which items when the battery switch is pushed off?

A

Left AIMS, Cpt displays and CDU , Standby Instruments bus

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7
Q

What ground handling bus powers?

A

Cargo doors, cargo compartment lights and maintenance access lights.

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8
Q

Ground service bus powers

A

Cabin lights and outlets, Main and Apu battery chargers, LEft forward Fuel pump

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9
Q

What the Cabin utility powers?

A

utilities such as

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10
Q

How many batteries ?

How many TRU ? Where they supply energy?

What if TRU failure happens?

A
  1. APU and Main
  2. L and R main DC bus , Cpt anf F/O Flt Inst. Bus

Bus tie brakers automatically feed other system

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11
Q

Back up generator source time limit?

A

Non-time limited source.

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12
Q

What is the power source of flight controls?

A

PMG (Permenant Magnet Generators)

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13
Q

What if the PMG fails?

A

DC buses supply energy to flight controls. If it is also fails hot battery bus feeds and addition to them one minute battery is at the each 3 of FCDC bus

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14
Q

What is the electrical configuration during Autoland?

A

3 independant sources. Right back up generator will be in use too

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15
Q

What is the primary source of DC power during normal operation?

What provides DC power on this airplane?

A

TRU

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16
Q

What is primary power source for fly-by-wire system?

A

Permenant Magnet Generators

17
Q

With no external power available, how can you power the ground handling bus after engine shutdown?

A

Start the APU

18
Q

Synoptics are not available in the airplane in standby mode. True or False?

A

True

19
Q

Only 1 backup generator at a time can power the transfer buses. True or False ?

A

True

20
Q

Autoland is possible with 1 main generator and 1 back up generator operating. True or False?

A

True.

21
Q

What is this EICAS message indicates?

A
22
Q

q

A

a

23
Q

APU cooldown period?

A

105 sec

24
Q

What is this EICAS means?

A
25
Q

EICAS

A

Reason

26
Q

Loss of all generators, APU switches ON automatically even the switch in OFF position. True or False?

A

True

27
Q

Test

A
28
Q
A
29
Q
A