A320 Oral Prep

Question 1

How do you charge the batteries if the voltage is below 25.5?

Answer 1

Select EXT power ON; Place BAT PBs ON; Check ECAM ELEC page that contactors
are closed and batteries charging.

Question 2

What does a FAULT light in a battery pb indicate?

Answer 2

Charging current for the corresponding battery is outside normal limits.

Question 3

With the FAULT light illuminated in the battery pb is the battery contactor open or closed?

Answer 3

Open

Question 4

With the battery PBs selected what busses are powered (assumes batteries are the only power source)?

Answer 4

HOTBATTERYBUS1and2 are always powered.

DC BATTERY BUS

Question 5

What is the difference between a green CB and a black CB?

Answer 5

GreenCBsaremonitoredbytheFWS.IfagreenCBisoutformorethan1minute,
then an ECAM will be generated.
o Black CBs are not directly monitored by the FWS. In this case the component
protected by a black CB is monitored directly by the FWS.