11.6 Flashcards
1
Q
Advantages of Ni-cd
A
- constant output
- lightweight (cost effective)
2
Q
Disadvantage of Ni cd
A
- thermal runaway
3
Q
How long must the battery run for when failed
A
30 mins
4
Q
Explain transformer rectifying unit
A
AC to DC
5
Q
Explain static invertor
A
DC to AC
6
Q
What consumes more power on a aircraft
A
- galleys
7
Q
What is a battery’s voltage
A
24V (DC)
8
Q
Aircraft DC voltage
A
28V (DC)
9
Q
Explain RAT
A
- electrical and hydraulic systems function
- rotary (AC)
10
Q
What can share electrical loads
A
Engines
11
Q
In series explain voltage and current
A
- voltage increases
- current same
12
Q
In parallel explain voltage and current
A
- voltage same
- current increases
13
Q
Explain battery venting
A
- prevents harmful vapours
- non-return valve to seal ventilation system (prevent reverse airflow)
14
Q
What type of fitting are battery connectors
A
Quick release
15
Q
Explain battery trays
A
- collect spilt electrolyte
16
Q
Where is the battery serviced
A
- battery checked outside of aircraft
17
Q
What does Ni-cd monitor when charging
A
-voltage and current
18
Q
What capacity must the battery be
A
80%
19
Q
How do you clean sulphuric acid on skin?
A
- preferably warm
20
Q
Advantages of lithium batteries
A
- deliver large amount of power in a short period of time
- recharge quicker
- weighs 30% level
- no memory degradation
21
Q
What is line/phase to neutral
A
- 115V
22
Q
What is line/phase to line/phase
A
200v
