Motors Book - Chapter 10

15 Questions | Total Attempts: 103

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Motors Book Quizzes & Trivia

Questions and Answers
  • 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. 

      Radial

    • B. 

      Trailing-edge

    • C. 

      Leading-edge

    • 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. 

      Reversing shaded-pole

    • 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

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