# Motors Book - Chapter 10

15 Questions | Total Attempts: 103  Settings  • 1.
A(n) ___ is a machine that uses DC connected to the field windings and armature to produce shaft rotation.
• A.

Alternator

• B.

Capacitor

• C.

Direct-current motor

• D.

Shunt motor

• 2.
A ___ is the stationary part in a DC motor or generator.
• A.

DC permanent magnet

• B.

Field frame

• C.

Neutral plane

• D.

Brush

• 3.
___ are auxiliary poles placed between the main field poles of the motor.
• A.

Windings

• B.

Interpoles

• C.

Armatures

• D.

Field poles

• 4.
___ brushes are at an angle to the commutator and have less restricted up-and-down movement.
• A.

• B.

Trailing-edge

• C.

• D.

All of the above

• 5.
A(n) ___ is a voltage induced in the windings that is opposite in polarity to that of the power supply.
• A.

Countervoltage

• B.

Indirect voltage

• C.

Armature reaction

• D.

True power

• 6.
___ is the process where the armature current is periodically reversed in order to keep the motor torque in the same direction during the entire armature rotation.
• A.

Inrush

• B.

Hysteresis

• C.

Reversing

• D.

Commutation

• 7.
The basic types of DC motors are DC series motors and ___ motors.
• A.

DC shunt

• B.

DC compound

• C.

Permanent-magnet

• D.

All of the above

• 8.
A(n) ___ motor is a DC motor that has the filed winding connected in parallel with the armature.
• A.

Series

• B.

Shunt

• C.

Design

• D.

Induction

• 9.
A ___ motor is a motor where the current flows in the opposite direction in the series and shunt coils and the resulting net flux is the difference between the two fluxes.
• A.

DC differential-compounded

• B.

DC cumulative-compounded

• C.

Reversing single-phase

• D.

Revering capacitor-motor

• 10.
A ___ motor is a motor that uses magnets, not a coil of wire, for the field windings.
• A.

Split-phase

• B.

• C.

DC permanent-magnet

• D.

Revolving-field

• 11.
___ is the ability of a source to vary the output voltage in order to maintain system voltage as the load varies.
• A.

Voltage regulation

• B.

Usage rating

• C.

Rotor frequency

• D.

Current rating

• 12.
A ___-wound generator is a type of DC generator
• A.

Series

• B.

Shunt

• C.

Compound

• D.

All of the above

• 13.
A(n) ___ is the rotating part of a DC motor, consisting of the laminated core with slots for the coils, the main shaft, and the commutator and brushes.
• A.

Stator

• B.

Armature

• C.

Pigtail

• D.

Permanent magnet

• 14.
The ___ is a line through the armature cross section that is perpendicular to the maximum amount of magnetic flux.
• A.

Armature field

• B.

Neutral plane

• C.

Armature plane

• D.

Magnetic field

• 15.
In a ___, the series field windings and shunt field windings are combined in a manner to take advantage of the characteristics of each.
• A.

Direct-current generator

• B.

Single-voltage motor

• C.

Self-excited shunt field

• D.

Compound-wound generator Back to top