Electrics, Nav & Fuel

Question 1

What is the IDG?

Answer 1

Integrated Drive Generator

Question 2

When does the RAT deploy automatically?

Answer 2

With the loss of AC Bus 1 and AC Bus 2 and above 100 kt

Question 3

What is the minimum speed for the RAT?

Answer 3

140 kt

Question 4

What are the DC batteries rated at?

Answer 4

24 V and 23 AH

Question 5

Why do you get an IDG fault light?

Answer 5

When the oil temp is too high - above 180 degrees

When oil pressure is low (but only when N2 is above 14%)

Question 6

What colour are monitored circuit breakers?

Answer 6

Green

Question 7

What colour are unmonitored circuit breakers?

Answer 7

Black

Question 8

What is the red circuit breaker?

Answer 8

Wing tip brakes - they are monitored

Question 9

What is the order of priority for power?

Answer 9

1) Engines
2) GPU (if selected)
3) APU

Question 10

How long can you press the IDG button for?

Answer 10

3 secs

Question 11

How long will the APU take to shut down after using the air conditioning?

Answer 11

120 secs

Question 12

Why does the battery fault light illuminate?

Answer 12

There is a fault with the battery charge limiter.

ECAM alert

Charging current for the corresponding battery is outside limits - battery contactor opens

Question 13

What happens if AC BUS 1 fails?

Answer 13

AC BUS 2 can supply AC ESS BUS

ESS TR can supply DC ESS BUS

Question 14

Are the TAT probes heated?

Answer 14

Yes - but not heated on the ground

Question 15

What does GPS1 supply?

Answer 15

ADIRU 1 and ADIRU 2

Question 16

What happens if GPS 1 fails?

Answer 16

GPS 2 can supply

Question 17

What are the three methods of tuning navaids?

Answer 17

1) automatic - via MCDU
2) manual
3) back up

Question 18

How many radalts?

Answer 18

two

Question 19

What is the max speed difference between ADIRU 1 and ADIRU 2 on the PFD?

Answer 19

6 kt

Question 20

What capabilities with one radalt failed?

Answer 20

Cat II ILS

Question 21

What is the role of the fuel system?

Answer 21

• Store fuel in the tanks
• Supply fuel in correct quantities to tanks during refuelling
• Supply fuel to the engines and the APU
• Circulate fuel to cool the IDG
• Control transfer of fuel from centre to wing inner tanks
• Keep fuel in outer wing tanks for wing bending and flutter relief

Question 22

What is the use of the vent tanks?

Answer 22

If the fuel has a temp rise of 20 degrees, the fuel can expand by 2% without spilling

Question 23

What is the minimum fuel?

Answer 23

1500 kg

Question 24

How can you close the LP valves?

Answer 24

• the engine master switch
• the ENG FIRE PUSH pb

Question 25

What is the use of the suction valves?

Answer 25

They allow engines to be gravity fed if the inner tank pumps fail

Question 26

What is the fuel feed sequence?

Answer 26

1) centre tank - fuel transfers to the inner tanks 2) wing inner tanks - each inner tank empties down to 750 kg 3) wing outer tanks - fuel transfers into the inner tanks

Question 27

How many refuel panels and couplings?

Answer 27

Two refuel panels and two couplings

Question 28

When will the centre tank pumps close?

Answer 28

5 minutes after the centre tank is empty

Question 29

What colour is the crossfeed ON light?

Answer 29

White light - illuminates when the valve starts to open

Question 30

What colour is the crossfeed OPEN light?

Answer 30

Green light - illuminates when the valve is fully open

Question 31

What does the green END light mean on the refuelling control panel (illuminated steady and flashing)?

Answer 31

illuminated steady = refuel is complete flashing = refuelling has been aborted

Question 32

When will you get an imbalance advisory?

Answer 32

When there is a difference of 1500 kg

Question 33

When does the 'fuel used' reset?

Answer 33

On engine start

Question 34

From which tank do the engines get fuel?

Answer 34

Inner tank

Question 35

When will the centre tank fill the inner tank?

Answer 35

When 500 kg has been used

Question 36

How long does the RAT take to extend?

Answer 36

5 seconds to extend and 3 seconds to supply power

Question 37

If gen 1 line is off, what does it still supply power to?

Answer 37

two fuel pumps and one igniter

Question 38

How long does it take to align the ADIRS?

Answer 38

7 minutes

Question 39

Why does the 'on battery' light come on for the ADIRS?

Answer 39

- beginning of an IRS alignment - one is being powered by the battery

Question 40

What does ADIRU 1 usually supply?

Answer 40

PFD1 and ND1

Question 41

To crossfeed fuel, which tank's fuel pump must be switched off?

Answer 41

The side low on fuel

Question 42

During a fuel imbalance, which tank flashes green

Answer 42

The more full tank

Question 43

How many fuel pumps?

Answer 43

Four main fuel pumps In normal ops, each engine is supplied from two pumps in its own side inner tank

Question 44

What is the purpose of the crossfeed valve?

Answer 44

Allows both engines to be fed from one side or one engine to be fed from both sides

Question 45

What is the FQI?

Answer 45

Fuel Quantity Indication System - transmits actual total fuel mass, quantity and temperature to the ECAM - controls automatic refuelling Has two channels, channel 2 will activate if channel 1 fails

Question 46

What does the fuel tank inerting system do?

Answer 46

Produces an oxygen-depleted air that goes into the centre tank to replace the ambient air, to reduce flammability

Question 47

When will you get a fuel quantity advisory?

Answer 47

In flight phases 2 and 6 with a difference of more than 1500 kg - wing inner and outer tank indications will pulse with the highest fuel level

Question 48

When will a half amber box appear around FOB?

Answer 48

When the displayed quantity is not all usable

Question 49

Why will the FOB indication be displayed with two dashes across the last two digits?

Answer 49

The FQI is in degraded mode