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