Motors Book - Chapter 6

12 Questions | Total Attempts: 119

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Motors Book Quizzes & Trivia

Questions and Answers
  • 1. 
    A(n) ___ motor is an induction motor with the squirrel-cage conductor bars replaced with coils of wire, and with added slip rings, brushes, and a resistor  circuit.
    • A. 

      Design

    • B. 

      Induction

    • C. 

      Wound-rotor

    • D. 

      Electronic

  • 2. 
    A wound-rotor motor can be distinguished from a squirrel-cage induction motor by the presence of the ___.
    • A. 

      Coils of wire in the winding slots instead of the solid conductor bars

    • B. 

      Three slip rings on the shaft

    • C. 

      External resistance bank

    • D. 

      All of the above

  • 3. 
    A(n) ___ ring is a metallic ring mounted on a motor shaft and electrically insulated from the shaft.
    • A. 

      Slip

    • B. 

      Conducting

    • C. 

      Shorting

    • D. 

      Induction

  • 4. 
    A ___ is an extended, flexible connection or a braided copper conductor.
    • A. 

      Coil winding

    • B. 

      Pigtial

    • C. 

      Eutectic alloy

    • D. 

      Plug fuse

  • 5. 
    The ___ carries the entire rotor current.
    • A. 

      Slip ring

    • B. 

      External resistor circuit

    • C. 

      Brush rigging

    • D. 

      Melting-alloy overload relay

  • 6. 
    The maximum ___ is produced when the maximum resistance is connected to the rotor and the induced frequency is at its highest.
    • A. 

      Flux

    • B. 

      Current

    • C. 

      Torque

    • D. 

      None of the above

  • 7. 
    A wound-rotor motor ___ is a device containing high-wattage resistors that is designed to control the speed of a wound-rotor motor and operate in variable-speed mode for as long as needed.
    • A. 

      Regulator

    • B. 

      Starter

    • C. 

      Resistor

    • D. 

      Drum switch

  • 8. 
    A ___ is a type of regulator.
    • A. 

      Drum switch

    • B. 

      Three-pole rheostat

    • C. 

      Silicon-controlled rectifier

    • D. 

      All of the above

  • 9. 
    A ___ is switch with tapped resistors used to switch a set of resistors in or out of a wound-rotor circuit. 
    • A. 

      Drum switch

    • B. 

      Silicon-controlled rectifier

    • C. 

      Three-pole rheostat

    • D. 

      Wound-rotor motor starter

  • 10. 
    A rheostat uses a three-___ to start the wound-rotor motor.
    • A. 

      Wire enclosure

    • B. 

      Wire control circuit

    • C. 

      Pole rheostat

    • D. 

      Pole circuit

  • 11. 
    Resistors designed for starting are able to dissipate the ___ generated during the short time required for starting the motor.
    • A. 

      Heat

    • B. 

      Current

    • C. 

      Voltage

    • D. 

      Magnetism

  • 12. 
    Increasing the resistance of the rotor while it is ___ reduces the current in the rotor windings and reduces the speed of the motor.
    • A. 

      Starting

    • B. 

      Stopping

    • C. 

      Running

    • D. 

      None of the above

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