Flashcards
Lesson 4
Flashcards do conjunto (23)
- 1alternator or generator power iseither 14v or 28v
- 2power is distributed via...?the bus bar
- 3circuit breakers purpose?protect electrical system in case of malfunction
- 4purpose of ammetermonitor electrical system
- 5what forms the earthaircraft structure
- 6disadvantages of generatorheavy
insufficient electrical current at low engine rpm
less efficient - 7alternator produces what type of currentalternating
- 8how is dc achieved from alternatorthrough rectifier which uses diodes
- 9before a alternator can start,the magnet rotor needs an exciter voltage from the battery to produce the necessary magnetic field
- 10advantages of alternatorconsistent and sufficient power across all rpms
simple and light construction
cheaper to maintain
less prrone to overload when loads are heavy - 11disadvantages of alternatorneeds an initial voltage exciter
- 12most popular batterieslead-acid and nick cadmium
- 13batteries in seriesincreases total voltage
same amp - 14batteries in parallelincrease current
same voltage - 15Left-zero ammeteron left of bus bar.
measures output of generator
also referred to as load meter - 16center-zero ammetermeasures flow of both.
current flowing into the battery will point to the right.
current flowing from the battery will point to the left
when no charge from battery, ammeter 0 - 17for any electrical system to recieve power, master switch must be...on
- 18Once the engine has been shut down, the master switch...must be shut down, to prevent the battery from discharging
- 19If battery switch is turned off while alternator is still on....the alternator will also turn off
- 20if alternator is turned off while battery is still turned on.....battery remains on
- 21starter motor is powered by...battery
- 22Replacing fuesesdo not replace 5amp with 15 amp as this allows more current to flow through and reduces the protection function
- 23—
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- Aircraft General Knowledge FlashCards sobre Lesson 4, criado por Matt Barnes em 27-11-2016.
- Criado por
- Matt Barnes
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