Deck 30: Direct Current Generators

Question 1

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

A) an alternator
B) a generator
C) a motor
D) an inverter

Answer 1

B

Question 2

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

Answer 2

Armature reaction

Question 3

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

A) series field shunt rheostat
B) shunt field series rheostat
C) series field exciter
D) shunt field exciter

Answer 3

A

Question 4

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

A) series
B) parallel

Question 5

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

A) self excited
B) separately excited
C) complex
D) compound

Question 6

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?

A) frogleg-wound
B) lap-wound
C) wave-wound

Question 7

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

A) many; large
B) few; large
C) many; small
D) few; small

Question 8

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 .

A) cumulative-compound
B) differential-compound

Question 9

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

A) many; large
B) many; small
C) few; large
D) few; small

Question 10

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) frogleg-wound
B) lap-wound
C) wave-wound

Question 11

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?

A) frogleg-wound
B) lap-wound
C) wave-wound

Question 12

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

A) field excitation current
B) input voltage
C) input torque
D) armature excitation current

Question 13

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 .

A) cumulative-compound
B) differential-compound

Question 14

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

A) commutator
B) alternator
C) converter
D) field

Question 15

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

Question 16

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

A) complexing
B) compounding
C) exciting
D) differential setting

Question 17

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

A) brushes
B) pole pieces
C) the armature
D) the case

Question 18

The rotating part of a generator is called the .

A) stator
B) field
C) armature
D) exciter

Question 19

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

A) series
B) parallel