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Exam 30: Direct Current Generators

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Question 1

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The _____ ride against the commutator segments and are used to connect the armature to the external circuit of the DC machine.

A) field windings
B) pole pieces
C) armature windings
D) brushes

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Question 2

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_______________ is the twisting or bending of the magnetic lines of flux of the pole pieces.

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Question 3

Multiple Choice

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A generator containing both series and shunt fields is called a _____ generator.

What provide(s) the magnetic field necessary for the operation of a DC machine?

The relationship of the strengths of the two fields in a generator determines the amount of _____.

_______________ is a measure of the useful electric energy produced by the generator.

The rotating part of a generator is called the _____.

What is a device that converts mechanical energy into DC electrical energy?

What is the component of a DC generator that converts the armature AC into DC?

The series generator has only a series field, which is connected in _____ with the armature.

Armatures are wound to provide high voltage, high current or some specific combination of voltage and current. Which type of winding provides moderate voltage and moderate current?

A compound generator has both series and shunt field windings. When those windings are connected so they aid each other in the production of magnetism, that connection is called _____.

Shunt generators contain only a shunt field winding connected in _____ with the armature.

In a generator, the _____ permits part of the current that normally flows through the series field to flow through the resistor.

A compound generator has both series and shunt field windings. When those windings are connected so their fields oppose each other in the production of magnetism, that connection is called _____.

Armatures are wound to provide high voltage, high current, or some specific combination of voltage and current. Which type of winding provides high voltage and low current?

Shunt field windings are connected in parallel with the armature. They are wound with _____ turns of fairly _____ wire.

Series field windings are connected in series with the armature. They are wound with _____ turns of fairly _____ wire.

Armatures are wound to provide high voltage, high current, or some specific combination of voltage and current. Which type of winding provides low voltage and high current?

The output voltage of a generator is usually controlled by the amount of _____.