14 - AMT - AIRFRAME - AIRCRAFT
ELECTRICAL SYSTEMS (132)CORRECT
100%
(8803)-Some electric motors have two sets of field windings wound in opposite
directions so that the? - ANSWER motor can be operated in either direction.
(8804)-One purpose of a growler test is to determine the presence of? - ANSWER a
shorted armature.
(8805)-Electric wire terminals for most aircraft applications must be what type? -
ANSWER Ring.
(8806)-What is the principal advantage of the series-wound dc motor? - ANSWER High
starting torque.
(8807)-If a generator is equipped with a vibrator-type voltage regulator, the actual time
the voltage regulator points remain open? - ANSWER depends on the load carried by
the generator.
(8808)-What is a cause of generator brush arcing? - ANSWER Low spring tension.
(8809)-What is required when operating two aircraft ac generators in parallel? -
ANSWER Frequency and voltage must both be equal.
(8810)-The starting current of a series-wound dc motor, in passing through both the field
and armature windings, produces a? - ANSWER high starting torque.
(8811)-Which motor would be most likely to have an armature brake? - ANSWER
Landing light retraction motor.
(8812)-The method most often used in overcoming the effect of armature reaction is
through the use of? - ANSWER interpoles.
(8813)-The only practical method of maintaining a constant voltage output from an
aircraft generator under varying conditions of speed and load is to vary the? - ANSWER
strength of the magnetic field.
(8814)-The pole pieces or shoes used in a dc generator are a part of the? - ANSWER
field assembly.
(8815)-How many cycles of ac voltage are produced in a six-pole alternator of the
revolving-field type for each revolution of the rotor? - ANSWER Three.
, (8816)-If the reverse current cutout relay contact points fail to open after the generator
output has dropped below battery potential, current will flow through the generator
armature? - ANSWER opposite the normal direction and through the shunt field in the
normal direction.
(8817)-How does the magnetic brake used to stop rotation of an electric motor armature
operate? - ANSWER A friction brake is applied by a spring and released by a magnet.
(8818)-In a generator, what eliminates any possible sparking to the brush guides
caused by the movement of the brushes within the holder? - ANSWER The brush
pigtail.
(8819)-A series-wound dc electric motor will normally require? - ANSWER more current
at low RPM than at high RPM.
(8820)-The type of electric wire terminals used for most aircraft applications, in addition
to providing good current carrying capabilities, are designed primarily? - ANSWER to
prevent circuit failure due to terminal disconnection.
(8821)-Aluminum wire must be stripped very carefully because? - ANSWER individual
strands will break easily after being nicked.
(8822)-The commutator of a generator? - ANSWER changes alternating current
produced in the armature into direct current as it is taken from the armature.
(8823)-An ammeter in a battery charging system is for the purpose of indicating the? -
ANSWER rate of current used to charge the battery.
(8824)-Which of the following is not one of the purposes of interpoles in a generator? -
ANSWER Reduce field strength.
(8825)-To test generator or motor armature windings for opens, - ANSWER place
armature in a growler and connect a 110V test light on adjacent segments; light should
light.
(8826)-What is the color and orientation of the position lights for navigation on civil
airplanes? - ANSWER Left side - red, right side - green, rear aft - white.
(8827)-To what depth is the mica insulation between the commutator bars of a dc
generator undercut? - ANSWER Equal to the width of the mica.
(8828)-A voltage regulator controls generator output by? - ANSWER varying current
flow to generator field coil.
ELECTRICAL SYSTEMS (132)CORRECT
100%
(8803)-Some electric motors have two sets of field windings wound in opposite
directions so that the? - ANSWER motor can be operated in either direction.
(8804)-One purpose of a growler test is to determine the presence of? - ANSWER a
shorted armature.
(8805)-Electric wire terminals for most aircraft applications must be what type? -
ANSWER Ring.
(8806)-What is the principal advantage of the series-wound dc motor? - ANSWER High
starting torque.
(8807)-If a generator is equipped with a vibrator-type voltage regulator, the actual time
the voltage regulator points remain open? - ANSWER depends on the load carried by
the generator.
(8808)-What is a cause of generator brush arcing? - ANSWER Low spring tension.
(8809)-What is required when operating two aircraft ac generators in parallel? -
ANSWER Frequency and voltage must both be equal.
(8810)-The starting current of a series-wound dc motor, in passing through both the field
and armature windings, produces a? - ANSWER high starting torque.
(8811)-Which motor would be most likely to have an armature brake? - ANSWER
Landing light retraction motor.
(8812)-The method most often used in overcoming the effect of armature reaction is
through the use of? - ANSWER interpoles.
(8813)-The only practical method of maintaining a constant voltage output from an
aircraft generator under varying conditions of speed and load is to vary the? - ANSWER
strength of the magnetic field.
(8814)-The pole pieces or shoes used in a dc generator are a part of the? - ANSWER
field assembly.
(8815)-How many cycles of ac voltage are produced in a six-pole alternator of the
revolving-field type for each revolution of the rotor? - ANSWER Three.
, (8816)-If the reverse current cutout relay contact points fail to open after the generator
output has dropped below battery potential, current will flow through the generator
armature? - ANSWER opposite the normal direction and through the shunt field in the
normal direction.
(8817)-How does the magnetic brake used to stop rotation of an electric motor armature
operate? - ANSWER A friction brake is applied by a spring and released by a magnet.
(8818)-In a generator, what eliminates any possible sparking to the brush guides
caused by the movement of the brushes within the holder? - ANSWER The brush
pigtail.
(8819)-A series-wound dc electric motor will normally require? - ANSWER more current
at low RPM than at high RPM.
(8820)-The type of electric wire terminals used for most aircraft applications, in addition
to providing good current carrying capabilities, are designed primarily? - ANSWER to
prevent circuit failure due to terminal disconnection.
(8821)-Aluminum wire must be stripped very carefully because? - ANSWER individual
strands will break easily after being nicked.
(8822)-The commutator of a generator? - ANSWER changes alternating current
produced in the armature into direct current as it is taken from the armature.
(8823)-An ammeter in a battery charging system is for the purpose of indicating the? -
ANSWER rate of current used to charge the battery.
(8824)-Which of the following is not one of the purposes of interpoles in a generator? -
ANSWER Reduce field strength.
(8825)-To test generator or motor armature windings for opens, - ANSWER place
armature in a growler and connect a 110V test light on adjacent segments; light should
light.
(8826)-What is the color and orientation of the position lights for navigation on civil
airplanes? - ANSWER Left side - red, right side - green, rear aft - white.
(8827)-To what depth is the mica insulation between the commutator bars of a dc
generator undercut? - ANSWER Equal to the width of the mica.
(8828)-A voltage regulator controls generator output by? - ANSWER varying current
flow to generator field coil.
