ELELCREIC TEST ONE OUT OF THREEEEEEE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

What converts AC into DC electricity?

Rectifier

What converts DC into AC electricity?

Inverter

What does a circuit breaker protect?

Wires

What is a starter generator?

Combo of generator & starter

Where is the starter generator found?

On Turboprops

What is the outside case of a generator called?

Field Frame

What does the field frame support?

Field poles and the magnetic circuit of the field

What is the field frame made of?

Heavy iron or steel

What is the output of the generator dependent on?

# of windings, Magnetic field strength, Armature speed

What determines frequency?

Speed or RPM of the armature

What does "CSD" stand for?

Constant Speed Drive

What is the Constant Speed Drive (CSD)?

Hydraulic transmission-type device providing constant input RPM to the AC generator

What is the Integrated Drive Generator?

Combo of the generator and CSD, reduces weight

What does the Integrated Drive Generator do?

Produces AC power

What is the Ram Air Turbine (RAT)?

An emergency system used to supply electrical and hydraulic power

What is meant by "flashing the field"?

Running voltage through a generator to recharge the magnetic field if it shows no voltage

What is meant by paralleling generators?

Maintaining equal load sharing for 3+ AC generators

What are the causes of brush sparking/arching?

Worn springs, worn brushes, brushes lined too closely

What can sparking/arching brushes cause?

Disturbing sensitive electronics or radio circuits

What is the most common frequency for aircraft electricity?

400Hz

Does the field spin or remain stationary for DC generators?

Field remains stationary

To what depth must the mica insulation be cut down to avoid interference with the brushes?

.020

What is used to step up or step down voltage?

Transformer

What is the only acceptable reading of a diode?

Showing electricity flow in only one direction

For a 3-phase AC rectifier, how many diodes are used?

6

What is one of the oldest electronic protection devices?

Fuses

What makes circuit breakers different from fuses?

Ability to be reused/reset

What is a circuit limiter also referred to as?

Slow-blow fuse

True or False; Most AC use single-wire systems since the AC frame acts as the ground?

True

What is the first stop after power is generated?

The bus

What is a continuous load?

Constant electrical flow; nav lights, electric fuel pumps, auto flight

What is an intermittent load?

Operated for up to 2min before shutoff; LG motors, flaps, trim tab

How do you ground a composite AC?

Metal mesh, bonding jumpers, metal plate

What is the final ground most of the time for composite aircraft?

The engine

How does AC 115V 400Hz -> 28V DC bus?

Using the Transformer Rectifier Unit (TRU)

What must be checked before grounding an aircraft?

Checking that circuit breakers are out, keys are turned off, and mags are off