Del 30

Question 1

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?

Answer 1

frogleg-wound

Question 2

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?

Answer 2

wave-wound

Question 3

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

Answer 3

series

Question 4

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

Answer 4

compounding

Question 5

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

Answer 5

many; small

Question 6

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

Answer 6

commutator

Question 7

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

Answer 7

series field shunt rheostat

Question 8

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

Answer 8

a generator

Question 9

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 _____.

Answer 9

differential-compound

Question 10

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

Answer 10

parallel

Question 11

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

Answer 11

pole pieces

Question 12

The rotating part of a generator is called the _____.

Answer 12

armature

Question 13

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 _____.

Answer 13

cumulative-compound

Question 14

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

Answer 14

few; large

Question 15

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?

Answer 15

lap-wound

Question 16

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

Answer 16

brushes

Question 17

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

Answer 17

compound

Question 18

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 _____.

Answer 18

cumulative-compound

Question 19

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

Answer 19

field excitation current