Jeppensen Chapter 7 Section A part 1

Question 1

In any generator, current will flow whenever there is _________ motion between the wire coil and the magnetic field.

Answer 1

relative

Question 2

The strength of the induced current depends on the _________ of the magnetic field and the _________ at which the lines of flux are cut.

Answer 2

strength, speed

Question 3

What does each of the three digits represent in the left-hand rule for generators?

A. First finger _________________________
B. Middle finger ______________________
C. Thumb _____________________________

Answer 3

A. Direction of magnetic flux,
B. Direction of induced EMF,
C. Direction conductor moves through the magnetic field

Question 4

The coil of wire in a generator where the current is induced is called the _________.

Answer 4

armature

Question 5

The device that converts the AC current produced in the armature into DC current is called the _________.

Answer 5

commutator

Question 6

Current is transferred from the rotating commutator to stationary __________.

Answer 6

brushes

Question 7

The principle parts of a small aircraft DC generator are the:
A. ____________________
B. ____________________
C. ____________________
D. ____________________

Answer 7

A. Field frame,
B. Armature,
C. Commutator,
D. Brush assembly

Question 8

The field frame of a generator has two primary functions. They are to:
A. ____________________
B. ____________________

Answer 8

A. Complete the magnetic circuit,
B. Provide mechanical support for the other parts

Question 9

The magnetizing force inside a generator is produced by an electromagnet called a __________ coil and a core called the __________ __________ or __________.

Answer 9

field,
field poles,
shoe

Question 10

Each brush is connected to the external circuit by a flexible braided-copper __________.

Answer 10

pig tail

Question 11

Brushes are made of high-grade __________ to prevent undue wear on the __________ yet still have a reasonable service life.

Answer 11

carbon,
commutator

Question 12

Generators may be constructed in one of three ways. They may be:
A. ____________________ wound.
B. ____________________ wound.
C. ____________________ wound.

Answer 12

A. Series,
B. Shunt,
C. Compound

Question 13

__________ wound generators are not used in aircraft because of poor voltage regulation characteristics.

Answer 13

series

Question 14

Compound-wound generators combine features of both series and shunt wound generators and may be one of three types: __________ compounded, __________ compounded or __________ compounded.

Answer 14

flat,
Under,
over

Question 15

The distortion of the magnetic field between the generator poles caused by the magnetic field created by the armature current is called __________ __________.

Answer 15

armature
reaction

Question 16

The position where the plane of two opposite coils is perpendicular to the magnetic field of the generator is called the __________ plane.

Answer 16

neutral