11.6 Flashcards
(12 cards)
What is electrical heating used for
Ovens, coffee machines, anti-ice systems, cockpit windows.
What are the 3 dc power sources
Battery
Eternal source
Dc generators.
What is the ac battery generally used to supply
Emergency power
APU starter motor.
What are aircraft batteries made of. / battery type
Nickel-cadmium type
How many volts do a/c batteries provide
24.
What does the emergency battery provide power to
Provides power to vital services such as fire extinguishers
What are the two types of battery fitted to aircraft
Ni-cd
Lead-acid.
What is the most common problem with ni-cd batteries
Thermal runaway
How do you check the level of a battery
By checking the voltage and current.
Of lead acid and nickel-cadmium, which type is more likely to undergo thermal runaway
Nickel cadmium type.
What is the most important contrinuting factor to thermal runaway once the battery is fitted to the aircraft?
Out of tolerance charging voltages.
What are the two basic methods of charging batteries
Constant voltage
Constant current.
