Electrical
armature reaction causes _____ at the brushes
arcing
passing alternating current through a transformer does what?
changes its voltage
A transformer does not change the power of the AC, but when the voltage is increased the current will _____________ decrease
correspondingly
A newer and far more common method of attachment to MS connectors to a wire is by ______ the tapered end of the wire and inserting the pin into the tapered hole in the backside of the pin or socket in the connector
crimping
It is important that when selecting a fuse the _______ ratings are appropriate for the circuit being used
current
slow blow fuses will allow a high current greater than the generator rating, but if there is _______ flow of ________ current it will open the armature circuit and remove the generator from the system
excess, continuous
thermal runaway of a nickel cadium battery occur when the cells of the battery become ______ _____
excessively hot
a SPDT switch can selector of the ______ paths
two
In a CSD unit a _______ ______ _______ pump supplied fluid to a hydraulic motor
variable delivery hydraulic
residual voltage produced when no current is flowing through the fiel coils is produces by the ______ magnetism in the field ______ of a generator
permanent, shoes
when routing long cables through the inside of a conduit what can be used to protect from damage when feeding through the grommet
powdered soapstone, tire talc, or regular talkum powder
CSD drive switches are ______ ________ ______ swith
electrically actuation disconnect wsitch
a rectifier is an electrical device or circuit that allows _____ to pass in one direction but ________ them in the opposite flow. A rectifier changes _____ into ______
electrons, blocks, AC into DC
If some of the field windings in transformer a shorted together an _____ amount of ______ will flow in the ______ and get hot
excessive, current, windings
The reason a transport category aircraft that uses AC power as the primary electrical source to be disconnected manually by a switch would be due to......
excessively generator-drive high oil temperatures
splices of the individual wires in a wire bundle should be staggered so the bundle does not become ________ ______
excessively large
permanent magnetism in the field frame produces residual ______ which is between ___ and ____ volts
voltage, one, two
Heat in a nickle cadium battery lowers both _______ and ________ so the cells can accept a high rate of ______ current, this high heat can ______ the battery
voltage, resistance , charging, destroy
a growler test test for shorts in the _______ of an armature
windings
Low spring tension on generator brushes can cause the brushes to ______ and ______
bounce, arc
many megometers have their own power supply _______ _______ ______
built into them
a disconnect with of a CSD would occur when....
a malfunction occurs
The voltage in an AC transformer secondary that contains twice as many loops as the primary will be....
the current in the secondary will be only one-half the current in the primary
Aluminum electrical cable is rated at _____ amps in free air and 50 amps in a _______ or ______.
83 conduit or bundle
Voltage drop equation =.....
Voltage drop = Resistance per feet x length of wire x amperes
the resistance of a field circuit in a generator determines the amount of field current allowed to _____
flow
Electrolytic action may rapidly corrode a bonding connection if _______ __________ are not taken
suitable precautions
when current lags _____ _____ lags
power factor
an equalizer circuit are in _______ engine DC generator systems and ______ an equal sharing of ______ between all generators
multi, maintain, load
the resistance of a electrical joint should be _____, relative to the resistance of the wire
negligible
Excessive draw from a batter will cause thermal runaway in a _____ ______ battery
nickel cadium
a 6 gauge copper electrical cable can carry ______ amps in free air and ______ amps in a bundle will have to be used to replace a number 6 ________ cable
101, 60, aluminum
14 CFR part _____ states that each re settable circuit protective device must be designed so that ______ ______ is required to restore service after tripping
14 CFR part 23, manual operation
If a transformer has a three to one step up ratio the secondary winding will have _______ times as many turns as the ________ winding. The secondary voltage will be _____ times the primary voltage
3x, secondary, 3x
an 8 gauge copper electrical cable in free air is rated for ____ amps and _____ amps in a bundle
73, 46
A diode is shorted of both readings are...
low
In an AC circuit with no phase lead or lag the power factor is _______ ______. All the current is in phase with the _______. The real power is equal to ______ ______
100 percent, voltage, apparent power
The temperature rise that triggers the thermal problems can come from heat generated by a fast discharge, from high _______ temperature, or from a breakdown of the ______ material
ambient, seperator
(1) A DC-selsyn system is a widely used electrical method of indicating a remote mechanical movement or position. (2) A synchro-type indicating system is an electrical system used for transmitting information from one point to another. Regarding the above statements,
both 1 and 2 are true
an IDG is a high output _______ ________ built into a single unit with a constant speed drive.
brush-less alternator
If armature reaction is not corrected it can cause ________ to the arc under certain _____ _______
brushes, load conditions
Changing the resistance within a field circuit may be done by using a _____ ____ voltage regulator, ________ type voltage regulator or a __________ voltage regulator
carbon pile, vibrator, transistor
when using a grommet the cable should be clamped to the structure so it passes through the _____ of the grommet
center
a rectifier is an electrical _______ _____ that allows electrons to flow only in one direction
check valve
The throws of a switch indicate the number of ______ or _______ for current he switch can select for each of its poles.
circuits, paths
AC generator speed is held ________ as the engine speed varies by a CSD unit
constant
_________ jumper are normally used to bond noncontinuous steel aircraft components
copper
______ is what leads or lags the ______
current, voltage
a rectifier serves to change alternating current into ______ current
direct
on a vibrator type voltage regulator when the load is high the voltage _____ and the points must remain ________ longer to allow the voltage to ______
drops, closed, rise
circuit breakers are installed as close to the source of _______ power as is practical, usually on the _____ ______ ______
electrical, main power bus
Series field coils are wound of relatively _______ turns of heady wire and have a very _______ resistance
few, low
with both ends of a field at ground potential, there can be no ______ ______. The only magnetic field for the armature windings to cut is that provided by ______ _______ in the generator _____ _____
field current, residual magnetism, field frame
A static inverter changes DC into AC via an oscillator that changes DC into AC with the proper _______ and _____. Then an ______ changes the voltage to the value needed
frequency, waveform,
Ensuring the pin section of an AN/MS connector being installed on the ______ side of a circuit and socket on the _____ side minimizes the possibility of a short between a connector and ground when the connectors are _______
ground, hot, seperated
the output of a DC generator normally has some AC ______, or ______ caused by brush arcing superimposed on it. This AC can pose the risk of causing radio interference but the radio interference can be removed by connecting a _____ between the _________ and ground in parallel with the armature windings. The AC passes to ground through a ______ impedance path provided by the capacitor
hash, noise, capacitor, armature, low
Slow blow fuses are designed to be installed in ______ ____ circuits
heavy power
a diode is open if both readings are....
high
interlopes are used in _____ ______ compound wound DC generators to counteract _____ _______ and to overcome ______ ______
high output, field distortion, armeture reaction
a diode is deemed good if it has a ____ resistance when checked in one direction and ____ when checked in the other
high,low
an ammeter in a battery charging circuit in an aircraft is used to indicate the rate of current that flows _____ or ______ of the battery
in, out
interlopes do not reduce the field strength they _______ it
increase
The most accurate frequency measuring devices are ________ instruments that contain.....
integrated circuit chips and a clock circui
on a vibrator type voltage regulator when the load is low the voltage _____ and the points remained ______ for a very _______ ______
is high, closed ,short time
If current is lagging power factor is ________
lagging
when a DC generator is overhauled the commutator is turned on a _______ until it is perfectly round and ______. after the commutator is turned the mica separates between the commutator bars are undercut to to around _____ inch
lahte, smooth, .02 inch
The iron cores used in most induction coils, transformers, and motors are made of ________ ________ _______. The thin lamentations reduce the losses caused by eddy currents flowing in the iron
laminated soft iron
Interpoles are used in ______ _______ wound DC generators to overcome the effect of _________ reaction
large compound, armeture
If current is leading the voltage power factor would be _______
leading
Micro switches are used primarily as ______ ______ to provide automatic control of such electrical units as flap and landing heat actuator motors
limit switches
fuses and circuit breakers protect the wiring in the ______ _______
load circuits
the pole pieces that are in a DC generator for a part of the ______ ____ for the field
magnetic circuit
a relay is a _______ operated _______ switch
magnetically electrical
circuit breakers are normally mounted directly on the _____ _____
main bus
Flashing the field of a generator is conducted by......
momentarily passing direct current from the battery through the generator field coils in the normal direction of current flow. this restores residual magnetism in a generator
Copper jumps may be safely used to bond ___________ stainless steel components
noncontinuous
Anchoring a stud against rotation is normally accomplished by using a _______ end on the stud set into a ______ hole in the terminal strip
square, square
series DC generators are not used in aircraft electrical systems because of the difficultly in regulating and controlling the ______ _______
output voltage
before AC generators can be connected in parallel it must be determined that the _______ _____ and ______ and ________ _______of all the generators are equal
output voltage, frequency, phase rotation
If the current rating is not stamped on the generator, the rating can be found by referring to the _____ _______ of the generator which is stamped on the ______ ______
part number, data plate
The friction stopping force of a electromagnetic motor is released by an electromagnet that is ______ when the motor is turned ______
released, on
If a stud comes loose on a ring type terminal connection the, connection will ______ on the stud whereas a slotted or hook will _______ ____
remain, fall off
DC selsyn systems are widely used method of remote indicating of ________ _________ conditions. Typically they are used to show _________ indication of systems and quantity indicating systems.
remote mechanical, movement
a basic difference between the autosyn and magnsyn remote indicating system us the type of _______ used. The magnysen uses a ______ magnet and the autosyn uses a ________
rotor, perminant, electromagnet
terminals must be able to ______ carry all the current the _____ can carry. They must also be designed in such a way that they cannot cause circuit failure by inadvertently disconnecting the from the _____ to which they are installed
safely, wire, terminal
when installing a rheostat in a light circuit to control the light intensity install it in ______ with the light
series
current limiters are a type of ______ _____ fuses in the generator _____ circuit
slow blow, output
A current limiter is a _____ _____ fuse that will take temporary high overload current but will open the circuit over _________ overload in excess of its rating
slow blow, sustained
Oil canning is the condition of a piece of sheet metal that causes it to _______ back and fourth when it is _______ or ________. If the sides of a junction box oil can there is a possibility of some of the _____ becoming shorted.
snap, distorted, vibrated, wires
the nominal rating of switches is usually stamped on the________ _______. This rating represents the continuous flow of current with the contacts of the switch _____
switch, housing, closed
an over voltage control protects generator system when there is excessive voltage in the ____
system
crimped terminals on an aircraft electrical wire transmits the ______ and _______ loads from the wire onto the terminal _______ and do not cause stress concentrations as is done with a _______ connection
tension and vibrational, gradually, soldered
a permanent magnet generator produces ______ phases ___ which is sent to the voltage regulator section of the _____. the output of the GCU supplies current to the exciter field coil which the ______ of the generator
three, AC, GCU, output
a brake in an armature causes the armature to stop _______ as soon as the switch is _______
turning, released
An intermittent duty circuit is one that is in operation for a maximum of ______ minutes
two
the general rule of thumb for replacing aluminum cable with copper cable is that copper of ____ wire gauges smaller (smaller = large number) may be used to replace aluminum.
two
slow blow fuses are for a small current limiter are ______ ______ in the field circuit that decreased the output voltage when the current exceeds the generator rating
variable resistor
The ratio of speed between the input and output of a CSD is _______ to maintain a constant generator speed by controlling the _______ of _______ that is delivered to the motor
varied pressure of fluid
A generator is cooled by air being pulled through its ______ by an integral fan, the fan is mounted on the ______ _______
windings, armature shaft