Airframe Electrical Systems CH 7-Questions with Correct
Answers/Verified
In any generator, current will flow whenever there is _ motion between the wire coil and
the magnetic field - ✔✔relative
The strength of the induced current depends on the _ of the magnetic field and the _ at
which the lines of flux are cut - ✔✔strength, speed
What does each of the three digits represent in the left hand rule for generators?
a. first finger
b. middle finger
c. thumb - ✔✔a. direction of magnetic
flux (north to south)
b. direction of induced
EMF (voltage)
c. direction conductor
moves through the
magnetic field
The coil of wire in a generator where the current is induced is called the _ - ✔✔armature
The device that converts the AC current produced in the armature into DC current is called
the _ - ✔✔commutator
Current is transferred from the rotating commutator to stationary _ - ✔✔brushes
The principle parts of a small aircraft DC generator are the: - ✔✔a. field frame
b. armature
c. commutator
d. brush assembly
, The field frame of a generator has two primary functions. They are to: - ✔✔a. complete the
magnetic circuit
b. provide mechanical
support for the other
parts.
The magnetizing force inside a generator is produced by an electromagnet called a _ coil
and a core called the _ _ or _ - ✔✔field, field poles, shoes
Each brush is connected to the external circuit by a flexible braided copper _ - ✔✔pigtail
Brushes are made of high-grade _ to prevent undue wear on the _ yet still have a
reasonable service life - ✔✔carbon, commutator
Generators may be constructed in one of three ways. They may be: - ✔✔a. series
b. shunt
c. compound
_ wound generators are not used in aircraft because of poor voltage regulation
characteristics - ✔✔Series
Compound wound generators combine features of both series and shunt wound generators
and may be one of the three types: _ compounded, _ compounded or _ compounded -
✔✔flat, under, over
The distortion of the magnetic field between the generator poles caused by the magnetic
field created by the armature current is called _ _ - ✔✔armature reaction
The position where the plane of two opposite coils is perpendicular to the magnetic field of
the generator is called the _ plane - ✔✔neutral
Answers/Verified
In any generator, current will flow whenever there is _ motion between the wire coil and
the magnetic field - ✔✔relative
The strength of the induced current depends on the _ of the magnetic field and the _ at
which the lines of flux are cut - ✔✔strength, speed
What does each of the three digits represent in the left hand rule for generators?
a. first finger
b. middle finger
c. thumb - ✔✔a. direction of magnetic
flux (north to south)
b. direction of induced
EMF (voltage)
c. direction conductor
moves through the
magnetic field
The coil of wire in a generator where the current is induced is called the _ - ✔✔armature
The device that converts the AC current produced in the armature into DC current is called
the _ - ✔✔commutator
Current is transferred from the rotating commutator to stationary _ - ✔✔brushes
The principle parts of a small aircraft DC generator are the: - ✔✔a. field frame
b. armature
c. commutator
d. brush assembly
, The field frame of a generator has two primary functions. They are to: - ✔✔a. complete the
magnetic circuit
b. provide mechanical
support for the other
parts.
The magnetizing force inside a generator is produced by an electromagnet called a _ coil
and a core called the _ _ or _ - ✔✔field, field poles, shoes
Each brush is connected to the external circuit by a flexible braided copper _ - ✔✔pigtail
Brushes are made of high-grade _ to prevent undue wear on the _ yet still have a
reasonable service life - ✔✔carbon, commutator
Generators may be constructed in one of three ways. They may be: - ✔✔a. series
b. shunt
c. compound
_ wound generators are not used in aircraft because of poor voltage regulation
characteristics - ✔✔Series
Compound wound generators combine features of both series and shunt wound generators
and may be one of the three types: _ compounded, _ compounded or _ compounded -
✔✔flat, under, over
The distortion of the magnetic field between the generator poles caused by the magnetic
field created by the armature current is called _ _ - ✔✔armature reaction
The position where the plane of two opposite coils is perpendicular to the magnetic field of
the generator is called the _ plane - ✔✔neutral
