Electrical 3

Front 1

which of the folowing controll devices is not required to be used with a ac generator

Back 1

zenior diode

Front 2

small generators rely on which for initial excitation

Back 2

residual magnetisim

Front 3

Lru's are

Back 3

line replacable units

Front 4

the ability of a magnet to retain magnetisim after the magnetizing force is removed

Back 4

is called the retentivity

Front 5

the output voltage of a aircraft generator is controlled by varing

Back 5

the strength of the field

Front 6

dc alternators employ diodes for the purpose of converting

Back 6

alternating current to direct current

Front 7

poor voltage regulation under changing load and the fact that they are never usd as aircraft generators describe a

Back 7

seies wound generator

Front 8

the of a dc generator serves as a rectirier which prouduces direct current

Back 8

commuttor and brushes

Front 9

the most practical method of mainting a constant voltaage output from an aircraft generator under varying conditions of speed and load is to vary the

Back 9

strength of the magnetic field

Front 10

the distortion or bending of the magnetic flux field between the poles of a generator under load thus causing a shift in the neutral plane is called

Back 10

armature reaction

Front 11

the ac frequency prouduced by a generator is determined by the

Back 11

# of rpm's divided by the # of poles

Front 12

when seating in new generator brushes you would generally use

Back 12

000 sandpaper

Front 13

the magnetic linsof flux usually flow from north to south and therfore mostgenerators have an even # of poles true or false

Back 13

true

Front 14

which is of the folowing not one of the purposes of interpoles in a generator

Back 14

reduce field strength

Front 15

when a dc generator is first putting out its rated voltage it is said to have reached its

Back 15

coming in speed

Front 16

a dc alternator uses aircraft power to get startes prouducing voltage and current dose or dose not

Back 16

dose

Front 17

to minimize arcing brushes are replaced

Back 17

on the neutralo plane

Front 18

in a dc alternator the stator is the

Back 18

stationary output coils

Front 19

in a dc alternator which of the following is not needed as a control device

Back 19

curtrent limiter

Front 20

how much should the mica insulators be undercut on the armature lathe

Back 20

equal to the width or thikness of the mica

Front 21

to restore residual magnetisim to a dc alternator you must

Back 21

do nothing as an alternator dose not use residual magnetisim

Front 22

what device is used to convert alternating current which has been induced into the loops of the rotating armature of a dc generator to direct current

Back 22

a commutator

Front 23

the stationary field strenth in a d irect current generator is varied

Back 23

according to the load requirements

Front 24

true of false since some brusheless alternators utilize a permenent manet their is no need to flash the field

Back 24

truse

Front 25

in a dc alternator (working properly) as the load is increased 9within capacity) the voltage will

Back 25

remain constant and the amperage will increase

Front 26

generator voltage will not build up wen the field is flashed and solder is found on a brush cover plate thses are most likely indications of

Back 26

a shered armature shaft

Front 27

the diodes are installed in a dc alternator to

Back 27

rectifie ac generated in the output stator coils

Front 28

to provide constant frequency on large aircraft as an engine speed varies and to maintain a uniform frequency between multiple generators, most ac generators are connected to a

Back 28

csd system

Front 29

true or false generator brushes are normally replaced at overhaul or when half worn

Back 29

true

Front 30

dc generator ratings are generaly

Back 30

stamped on the data or name plate

Front 31

the rotation of generators is termed as either clockwise or counterclockwise as viewed from the

Back 31

driven end

Front 32

according to the laft hand rule for gdnerators the thumb would indicate the

Back 32

counductor moement

Front 33

when genertaor voltage is regulated by the field rheostat more resistance results in

Back 33

less out put voltage

Front 34

some modern jet aircraft produce ac generator called a wich differs from a csd in that both the constant sped drive and the generator are sealed in the same housing

Back 34

idg integrated drive generator

Front 35

in a brushless alternator current is induced into the field coil through an

Back 35

exciter

Front 36

all the current is carried from the bruch of a dc generator supported in a brush holder through the rather than through the sliding contact made between the brush and the brush guide or brush holder

Back 36

brush pigail

Front 37

true or fale a voltage regulator controls the generator output voltage by varying the ressistance of the generator field

Back 37

true

Front 38

true or fales the voltage out put ofan ac alternator is determoned by the amount of current flowing in its dc exciter out put field

Back 38

false

Front 39

true or false a rectifier as an electrical check valve that allows electrond to flow in only on direction

Back 39

false

Front 40

t or f generators are rated according to the current they can prouduce at their rated voltage

Back 40

true

Front 41

t or f the poles of a generator are made of laminated soft to reducethe sddy currents and concentarte the lines of force

Back 41

fales

Front 42

t or f if an ohmeter is connected correctly and indicates some valuse of ressistance current is flowing through the compnet and it has continuity and it has an open

Back 42

false

Front 43

t or f acsd unit drives a genertaor throuh the use of a variable hydroulicpump and a hydrulic motor

Back 43

true

Front 44

as added insurance to make sure that a given electric load does not exceed a generators output capability the total continuos electrical load permitted in a given system is limited to percent of the total rated generator out put

Back 44

80%