DC Motor and Generator

Question 1

___ is the word used to describe the sliding connection that changes the polarity of the armature windings.

– voltage
– commutation
– generation
– magnetic field

Answer 1

Cummutation

Question 2

Mechanical energy needs to move conductor through___to generate a voltage.

Answer 2

Magnetic field

Question 3

When the generator coil cuts through the magnetic field where it is strongest, ____ voltage is generated.

Answer 3

Peak

Question 4

A ___ generator combines the designs of series wound and shunt wound generators.

Answer 4

Compound wound

Question 5

When the magnetic field of the conductor and the stationary magnetic field have the same polarity so that the repel each other, the action is called___.

Answer 5

Motor action

Question 6

As the applied voltage to a motor causes it to rotate, that action between the armature conductors and the magnetic field generates a voltage called___.

Answer 6

CEMF

Question 7

The field pole winding of a series wound DC motor are in___with the Armature field windings.

Answer 7

Series

Question 8

When the field pole windings of a compound wound DC motor are designed to aid each, the motor is called ____.

Answer 8

Cumulatively compound

Question 9

To change the rotation direction of a DC motor, you must___.

– We can the field pole strength
– strengthen the Armature current
– Change the polarity of either the field pole windings or the Armature filled windings
– change polarity of both filled windings

Answer 9

Change the polarity of either the field pole windings or the amateur field windings

Question 10

To increase the speed of the shunt wound motor above normal operating speed, you must___magnetic field poles.

– increase the number of
– change polarity of
– strengthen
– weaken

Answer 10

Weaken

Question 11

You can change the speed of a series wound motor by varying the ___ applied to the motor.

Answer 11

Voltage

Question 12

A ___ generator combines the designs of series wounds and shunt wound generators.

– Unusable
– compound wound
– series wound
– shunt wound

Answer 12

Compound wound

Question 13

The___generator has field pole windings in series with the armature and field pole windings in parallel with the armature.

Answer 13

Compound wound

Question 14

Mechanical energy needs to move a conductor through a ___ to generate a voltage.

Answer 14

Magnetic field

Question 15

To change the rotation direction of a DC motor, you must__.

Answer 15

Change polarity of either the field pole or the armature field windings

Question 16

The sliding connection, which makes contact with the bushings, it’s called the___.

– armature
– commutator
– stator
– coil

Answer 16

Commutator

Question 17

The amount of torque produced to by a motor is determined by the number of windings in the field and armature coils and___.

– Current flowing through them
– Resistance of the magnet
– ambient temperature
– type a bearings used

Answer 17

Current flowing in them

Question 18

To increase the speed of the shunt wound motor above normal operating speed, you must___magnetic field poles.

Answer 18

Weaken

Question 19

As the applied voltage to a motor causes it to rotate, that action between the armature conductors and the magnetic field generates a voltage called___.

Answer 19

CEMF

Question 20

Armatures wound with windings in parallel to produce higher current are called___armatures.

– lap wound
– segment wound
– runner wound
– parallel wound

Answer 20

Lap wound

Question 21

When the generator coil cuts through the magnetic field where it is the strongest,__voltage is generated.

Answer 21

Peak

Question 22

A __ DC generator is designed to have the field pole winding in parallel with the armature field winding.

• shunt wound
• series wound
• Compound wound
• differentially compounded

Answer 22

Shunt wound