Electrical

Question 1

List the AC sources for Electrical power?

Answer 1

-2 IDGS
-APU Generator
-RAT
-AC ground power Cart
-Inverter

Question 2

What are DC power sources?

Answer 2

2 lead acid sealed DC Batteries
3 TRUS

Question 3

Which power source has priority, APU or GPU?

Answer 3

APU

Question 4

System Logic provides Electrical power for the aircraft following source priority:

Answer 4

RAGO

Respective IDG
APU
GPU
Opposite IDG

Question 5

In What circumstances would we use a DC GPU?

Answer 5

For APU starts if battery 2 is unavailable

Question 6

What does the amber light next to IDG mean?

Answer 6

That IDG must be shutdown

Question 7

What would cause the amber light next to IDG to come on?

Answer 7

HOTLOP
High temps or low pressure
annunciator test

Question 8

If an IDG is disconnected, can it be maually connected by the pilots on the ground or in flight?

Answer 8

no, maintenence must do it

Question 9

Can One IDG power the whole electrical system?

Answer 9

Yes

Question 10

Can the APU fully replace Failed IDG?

Answer 10

Yes

Question 11

What will charge Batteries?

Answer 11

Any AC source

Question 12

What Items are on the Hot Battery Bus?

Answer 12

Engine fire extinguishers
Fuel shutoff Valve
HYD SOV
Dome Lights
Oil level Indication
refueling panel
water service panel

Question 13

Why does Battery 1 have on, but not AUTO?

Answer 13

Battery 1 does not require automation for APU start.

Question 14

Why does Battery 2 have an AUTO selection?

Answer 14

To power the APU start bus

Question 15

regarding the APU Battery 1 supplies _______ with power and Battery 2 supplies_____________.

Answer 15

Battery 1- Fadec
Battery 2- APU Start bus

Question 16

What is the Voltage of battery?

Answer 16

24 V

Question 17

Below what voltage would batteries need to be charged?

Answer 17

22V

Question 18

Below what voltage would Mx be required to service the batteries?

Answer 18

21V

Question 19

When would the RAT Deploy Automatically?

Answer 19

When AC Buses are not powered

Question 20

During an Electrical Emergency, how long will battery supply power if the RAT does not deploy?

Answer 20

10 mins

Question 21

What is available during an electrical emergency?

Answer 21

DU 2&3, CCD1, MCDU 2, audio panels, clock, IESS and compass backlight.

Question 22

When electrical load increases beyond the system what happens?

Answer 22

Load shedding

Question 23

what are the speeds to remember for RAT?

Answer 23

150KT MIN. DEPLOY
130KT MIN FOR POWER