Electrical Exam Flashcards
3 types of warning
Warning, caution, advisory
How to silence an alarm?
Momentarily press the attention getter
What is A in the pictures?
Ram air turbine.
What is B?
Emergency Power Unit
Standard ac voltage
24v
What is D?
DC generator used for runs electrics and barges battery charges
What is E?
Ground power unit 28v & 200v, power batteries and engine starting
What is F?
APU, engine starting
What is G?
AAPU, electrics, Hyd, air con, can be used on ground and in air.
Function of CSDU?
Constant speed drive unit, driven by accessory gearbox, maintains rpm
What does an inverter do?
DC-AC
What does a converter do?
Changes frequency
What is a TRU?
AC input of one voltage to DC output of another, 200AC-28DC
3 types of busbar?
Essential, Non essential, Vital
Ac system voltage must be maintained within a set tolerance of?
Engine speeds and electrical loads.
How does a voltage regulator work?
Stimulates exciter field
Standard ac systems are configured to?
200v 400hz 3 phase
Managing 2 generators in parallel must sense
Volt, frequency, phase angle through the FCU
Voltage must be maintained between a set range if
Engine speeds and electrical loads
What is the function of the load sharing control unit?
Ensure equal output from each generator
System protection
Circuit breakers, fuses, RCCOs
What component disconnects battery in a crash?
Crash switch
Most common hyd system?
Landing gear
Accumulator?
Absorbs shocks to the system
